xref: /aosp_15_r20/external/libtextclassifier/native/utils/hash/farmhash.cc (revision 993b0882672172b81d12fad7a7ac0c3e5c824a12)

/*
 * Copyright (C) 2018 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "utils/hash/farmhash.h"

// FARMHASH ASSUMPTIONS: Modify as needed, or use -DFARMHASH_ASSUME_SSE42 etc.
// Note that if you use -DFARMHASH_ASSUME_SSE42 you likely need -msse42
// (or its equivalent for your compiler); if you use -DFARMHASH_ASSUME_AESNI
// you likely need -maes (or its equivalent for your compiler).

#ifdef FARMHASH_ASSUME_SSE42
#undef FARMHASH_ASSUME_SSE42
#define FARMHASH_ASSUME_SSE42 1
#endif

#ifdef FARMHASH_ASSUME_AESNI
#undef FARMHASH_ASSUME_AESNI
#define FARMHASH_ASSUME_AESNI 1
#endif

#if !defined(FARMHASH_CAN_USE_CXX11) && defined(LANG_CXX11)
#define FARMHASH_CAN_USE_CXX11 1
#else
#undef FARMHASH_CAN_USE_CXX11
#define FARMHASH_CAN_USE_CXX11 0
#endif

// FARMHASH PORTABILITY LAYER: Runtime error if misconfigured

#ifndef FARMHASH_DIE_IF_MISCONFIGURED
#define FARMHASH_DIE_IF_MISCONFIGURED do { *(char*)(len % 17) = 0; } while (0)
#endif

// FARMHASH PORTABILITY LAYER: "static inline" or similar

#ifndef STATIC_INLINE
#define STATIC_INLINE static inline
#endif

// FARMHASH PORTABILITY LAYER: LIKELY and UNLIKELY

#if !defined(LIKELY)
#if defined(FARMHASH_OPTIONAL_BUILTIN_EXPECT) && !defined(HAVE_BUILTIN_EXPECT)
#define LIKELY(x) (x)
#else
#define LIKELY(x) (__builtin_expect(!!(x), 1))
#endif
#endif

#undef UNLIKELY
#define UNLIKELY(x) !LIKELY(!(x))

// FARMHASH PORTABILITY LAYER: endianness and byteswapping functions

#ifdef WORDS_BIGENDIAN
#undef FARMHASH_BIG_ENDIAN
#define FARMHASH_BIG_ENDIAN 1
#endif

#if defined(FARMHASH_LITTLE_ENDIAN) && defined(FARMHASH_BIG_ENDIAN)
#error
#endif

#if !defined(FARMHASH_LITTLE_ENDIAN) && !defined(FARMHASH_BIG_ENDIAN)
#define FARMHASH_UNKNOWN_ENDIAN 1
#endif

#if !defined(bswap_32) || !defined(bswap_64)
#undef bswap_32
#undef bswap_64

#if defined(HAVE_BUILTIN_BSWAP) || defined(__clang__) ||                \
  (defined(__GNUC__) && ((__GNUC__ == 4 && __GNUC_MINOR__ >= 8) ||      \
                         __GNUC__ >= 5))
// Easy case for bswap: no header file needed.
#define bswap_32(x) __builtin_bswap32(x)
#define bswap_64(x) __builtin_bswap64(x)
#endif

#endif

#if defined(FARMHASH_UNKNOWN_ENDIAN) || !defined(bswap_64)

#ifdef _MSC_VER

#undef bswap_32
#undef bswap_64
#define bswap_32(x) _byteswap_ulong(x)
#define bswap_64(x) _byteswap_uint64(x)

#elif defined(__APPLE__)

// Mac OS X / Darwin features
#include <libkern/OSByteOrder.h>
#undef bswap_32
#undef bswap_64
#define bswap_32(x) OSSwapInt32(x)
#define bswap_64(x) OSSwapInt64(x)

#elif defined(__sun) || defined(sun)

#include <sys/byteorder.h>
#undef bswap_32
#undef bswap_64
#define bswap_32(x) BSWAP_32(x)
#define bswap_64(x) BSWAP_64(x)

#elif defined(__FreeBSD__)

#include <sys/endian.h>
#undef bswap_32
#undef bswap_64
#define bswap_32(x) bswap32(x)
#define bswap_64(x) bswap64(x)

#elif defined(__OpenBSD__)

#include <sys/types.h>
#undef bswap_32
#undef bswap_64
#define bswap_32(x) swap32(x)
#define bswap_64(x) swap64(x)

#elif defined(__NetBSD__)

#include <machine/bswap.h>
#include <sys/types.h>
#if defined(__BSWAP_RENAME) && !defined(__bswap_32)
#undef bswap_32
#undef bswap_64
#define bswap_32(x) bswap32(x)
#define bswap_64(x) bswap64(x)
#endif

#else

#undef bswap_32
#undef bswap_64
#include <byteswap.h>

#endif

#ifdef WORDS_BIGENDIAN
#define FARMHASH_BIG_ENDIAN 1
#endif

#endif

#ifdef FARMHASH_BIG_ENDIAN
#define uint32_in_expected_order(x) (bswap_32(x))
#define uint64_in_expected_order(x) (bswap_64(x))
#else
#define uint32_in_expected_order(x) (x)
#define uint64_in_expected_order(x) (x)
#endif

namespace NAMESPACE_FOR_HASH_FUNCTIONS {

STATIC_INLINE uint64_t Fetch64(const char *p) {
  uint64_t result;
  memcpy(&result, p, sizeof(result));
  return uint64_in_expected_order(result);
}

STATIC_INLINE uint32_t Fetch32(const char *p) {
  uint32_t result;
  memcpy(&result, p, sizeof(result));
  return uint32_in_expected_order(result);
}

STATIC_INLINE uint32_t Bswap32(uint32_t val) { return bswap_32(val); }
STATIC_INLINE uint64_t Bswap64(uint64_t val) { return bswap_64(val); }

// FARMHASH PORTABILITY LAYER: bitwise rot

STATIC_INLINE uint32_t BasicRotate32(uint32_t val, int shift) {
  // Avoid shifting by 32: doing so yields an undefined result.
  return shift == 0 ? val : ((val >> shift) | (val << (32 - shift)));
}

STATIC_INLINE uint64_t BasicRotate64(uint64_t val, int shift) {
  // Avoid shifting by 64: doing so yields an undefined result.
  return shift == 0 ? val : ((val >> shift) | (val << (64 - shift)));
}

#if defined(_MSC_VER) && defined(FARMHASH_ROTR)

STATIC_INLINE uint32_t Rotate32(uint32_t val, int shift) {
  return sizeof(unsigned long) == sizeof(val) ?
      _lrotr(val, shift) :
      BasicRotate32(val, shift);
}

STATIC_INLINE uint64_t Rotate64(uint64_t val, int shift) {
  return sizeof(unsigned long) == sizeof(val) ?
      _lrotr(val, shift) :
      BasicRotate64(val, shift);
}

#else

STATIC_INLINE uint32_t Rotate32(uint32_t val, int shift) {
  return BasicRotate32(val, shift);
}
STATIC_INLINE uint64_t Rotate64(uint64_t val, int shift) {
  return BasicRotate64(val, shift);
}

#endif

}  // namespace NAMESPACE_FOR_HASH_FUNCTIONS

// FARMHASH PORTABILITY LAYER: debug mode or max speed?
// One may use -DFARMHASH_DEBUG=1 or -DFARMHASH_DEBUG=0 to force the issue.

#if !defined(FARMHASH_DEBUG) && (!defined(NDEBUG) || defined(_DEBUG))
#define FARMHASH_DEBUG 1
#endif

#undef debug_mode
#if FARMHASH_DEBUG
#define debug_mode 1
#else
#define debug_mode 0
#endif

// PLATFORM-SPECIFIC FUNCTIONS AND MACROS

#undef x86_64
#if defined (__x86_64) || defined (__x86_64__)
#define x86_64 1
#else
#define x86_64 0
#endif

#undef x86
#if defined(__i386__) || defined(__i386) || defined(__X86__)
#define x86 1
#else
#define x86 x86_64
#endif

#if !defined(is_64bit)
#define is_64bit (x86_64 || (sizeof(void*) == 8))
#endif

#undef can_use_sse42
#if defined(__SSE4_2__) || defined(FARMHASH_ASSUME_SSE42)

#include <nmmintrin.h>
#define can_use_sse42 1
// Now we can use _mm_crc32_u{32,16,8}.  And on 64-bit platforms, _mm_crc32_u64.

#else
#define can_use_sse42 0
#endif

#undef can_use_aesni
#if defined(__AES__) || defined(FARMHASH_ASSUME_AESNI)

#include <wmmintrin.h>
#define can_use_aesni 1
// Now we can use _mm_aesimc_si128 and so on.

#else
#define can_use_aesni 0
#endif

#if can_use_sse42 || can_use_aesni
STATIC_INLINE __m128i Load128(const char* s) {
  return _mm_loadu_si128(reinterpret_cast<const __m128i*>(s));
}
#endif
// Building blocks for hash functions

// std::swap() was in <algorithm> but is in <utility> from C++11 on.
#if !FARMHASH_CAN_USE_CXX11
#include <algorithm>
#endif

#undef PERMUTE3
#define PERMUTE3(a, b, c) do { std::swap(a, b); std::swap(a, c); } while (0)

namespace NAMESPACE_FOR_HASH_FUNCTIONS {

// Some primes between 2^63 and 2^64 for various uses.
static const uint64_t k0 = 0xc3a5c85c97cb3127ULL;
static const uint64_t k1 = 0xb492b66fbe98f273ULL;
static const uint64_t k2 = 0x9ae16a3b2f90404fULL;

// Magic numbers for 32-bit hashing.  Copied from Murmur3.
static const uint32_t c1 = 0xcc9e2d51;
static const uint32_t c2 = 0x1b873593;

// A 32-bit to 32-bit integer hash copied from Murmur3.
STATIC_INLINE uint32_t fmix(uint32_t h)
{
  h ^= h >> 16;
  h *= 0x85ebca6b;
  h ^= h >> 13;
  h *= 0xc2b2ae35;
  h ^= h >> 16;
  return h;
}

STATIC_INLINE uint32_t Mur(uint32_t a, uint32_t h) {
  // Helper from Murmur3 for combining two 32-bit values.
  a *= c1;
  a = Rotate32(a, 17);
  a *= c2;
  h ^= a;
  h = Rotate32(h, 19);
  return h * 5 + 0xe6546b64;
}

template <typename T> STATIC_INLINE T DebugTweak(T x) {
  if (debug_mode) {
    if (sizeof(x) == 4) {
      x = ~Bswap32(x * c1);
    } else {
      x = ~Bswap64(x * k1);
    }
  }
  return x;
}

template <> uint128_t DebugTweak(uint128_t x) {
  if (debug_mode) {
    uint64_t y = DebugTweak(Uint128Low64(x));
    uint64_t z = DebugTweak(Uint128High64(x));
    y += z;
    z += y;
    x = Uint128(y, z * k1);
  }
  return x;
}

using namespace std;
namespace farmhashna {
#undef Fetch
#define Fetch Fetch64

#undef Rotate
#define Rotate Rotate64

#undef Bswap
#define Bswap Bswap64

STATIC_INLINE uint64_t ShiftMix(uint64_t val) {
  return val ^ (val >> 47);
}

STATIC_INLINE uint64_t HashLen16(uint64_t u, uint64_t v) {
  return Hash128to64(Uint128(u, v));
}

STATIC_INLINE uint64_t HashLen16(uint64_t u, uint64_t v, uint64_t mul) {
  // Murmur-inspired hashing.
  uint64_t a = (u ^ v) * mul;
  a ^= (a >> 47);
  uint64_t b = (v ^ a) * mul;
  b ^= (b >> 47);
  b *= mul;
  return b;
}

STATIC_INLINE uint64_t HashLen0to16(const char *s, size_t len) {
  if (len >= 8) {
    uint64_t mul = k2 + len * 2;
    uint64_t a = Fetch(s) + k2;
    uint64_t b = Fetch(s + len - 8);
    uint64_t c = Rotate(b, 37) * mul + a;
    uint64_t d = (Rotate(a, 25) + b) * mul;
    return HashLen16(c, d, mul);
  }
  if (len >= 4) {
    uint64_t mul = k2 + len * 2;
    uint64_t a = Fetch32(s);
    return HashLen16(len + (a << 3), Fetch32(s + len - 4), mul);
  }
  if (len > 0) {
    uint8_t a = s[0];
    uint8_t b = s[len >> 1];
    uint8_t c = s[len - 1];
    uint32_t y = static_cast<uint32_t>(a) + (static_cast<uint32_t>(b) << 8);
    uint32_t z = len + (static_cast<uint32_t>(c) << 2);
    return ShiftMix(y * k2 ^ z * k0) * k2;
  }
  return k2;
}

// This probably works well for 16-byte strings as well, but it may be overkill
// in that case.
STATIC_INLINE uint64_t HashLen17to32(const char *s, size_t len) {
  uint64_t mul = k2 + len * 2;
  uint64_t a = Fetch(s) * k1;
  uint64_t b = Fetch(s + 8);
  uint64_t c = Fetch(s + len - 8) * mul;
  uint64_t d = Fetch(s + len - 16) * k2;
  return HashLen16(Rotate(a + b, 43) + Rotate(c, 30) + d,
                   a + Rotate(b + k2, 18) + c, mul);
}

// Return a 16-byte hash for 48 bytes.  Quick and dirty.
// Callers do best to use "random-looking" values for a and b.
STATIC_INLINE pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
    uint64_t w, uint64_t x, uint64_t y, uint64_t z, uint64_t a, uint64_t b) {
  a += w;
  b = Rotate(b + a + z, 21);
  uint64_t c = a;
  a += x;
  a += y;
  b += Rotate(a, 44);
  return std::make_pair(a + z, b + c);
}

// Return a 16-byte hash for s[0] ... s[31], a, and b.  Quick and dirty.
STATIC_INLINE pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
    const char* s, uint64_t a, uint64_t b) {
  return WeakHashLen32WithSeeds(Fetch(s),
                                Fetch(s + 8),
                                Fetch(s + 16),
                                Fetch(s + 24),
                                a,
                                b);
}

// Return an 8-byte hash for 33 to 64 bytes.
STATIC_INLINE uint64_t HashLen33to64(const char *s, size_t len) {
  uint64_t mul = k2 + len * 2;
  uint64_t a = Fetch(s) * k2;
  uint64_t b = Fetch(s + 8);
  uint64_t c = Fetch(s + len - 8) * mul;
  uint64_t d = Fetch(s + len - 16) * k2;
  uint64_t y = Rotate(a + b, 43) + Rotate(c, 30) + d;
  uint64_t z = HashLen16(y, a + Rotate(b + k2, 18) + c, mul);
  uint64_t e = Fetch(s + 16) * mul;
  uint64_t f = Fetch(s + 24);
  uint64_t g = (y + Fetch(s + len - 32)) * mul;
  uint64_t h = (z + Fetch(s + len - 24)) * mul;
  return HashLen16(Rotate(e + f, 43) + Rotate(g, 30) + h,
                   e + Rotate(f + a, 18) + g, mul);
}

uint64_t Hash64(const char *s, size_t len) {
  const uint64_t seed = 81;
  if (len <= 32) {
    if (len <= 16) {
      return HashLen0to16(s, len);
    } else {
      return HashLen17to32(s, len);
    }
  } else if (len <= 64) {
    return HashLen33to64(s, len);
  }

  // For strings over 64 bytes we loop.  Internal state consists of
  // 56 bytes: v, w, x, y, and z.
  uint64_t x = seed;
  uint64_t y = seed * k1 + 113;
  uint64_t z = ShiftMix(y * k2 + 113) * k2;
  pair<uint64_t, uint64_t> v = std::make_pair(0, 0);
  pair<uint64_t, uint64_t> w = std::make_pair(0, 0);
  x = x * k2 + Fetch(s);

  // Set end so that after the loop we have 1 to 64 bytes left to process.
  const char* end = s + ((len - 1) / 64) * 64;
  const char* last64 = end + ((len - 1) & 63) - 63;
  assert(s + len - 64 == last64);
  do {
    x = Rotate(x + y + v.first + Fetch(s + 8), 37) * k1;
    y = Rotate(y + v.second + Fetch(s + 48), 42) * k1;
    x ^= w.second;
    y += v.first + Fetch(s + 40);
    z = Rotate(z + w.first, 33) * k1;
    v = WeakHashLen32WithSeeds(s, v.second * k1, x + w.first);
    w = WeakHashLen32WithSeeds(s + 32, z + w.second, y + Fetch(s + 16));
    std::swap(z, x);
    s += 64;
  } while (s != end);
  uint64_t mul = k1 + ((z & 0xff) << 1);
  // Make s point to the last 64 bytes of input.
  s = last64;
  w.first += ((len - 1) & 63);
  v.first += w.first;
  w.first += v.first;
  x = Rotate(x + y + v.first + Fetch(s + 8), 37) * mul;
  y = Rotate(y + v.second + Fetch(s + 48), 42) * mul;
  x ^= w.second * 9;
  y += v.first * 9 + Fetch(s + 40);
  z = Rotate(z + w.first, 33) * mul;
  v = WeakHashLen32WithSeeds(s, v.second * mul, x + w.first);
  w = WeakHashLen32WithSeeds(s + 32, z + w.second, y + Fetch(s + 16));
  std::swap(z, x);
  return HashLen16(HashLen16(v.first, w.first, mul) + ShiftMix(y) * k0 + z,
                   HashLen16(v.second, w.second, mul) + x,
                   mul);
}

uint64_t Hash64WithSeeds(const char *s, size_t len, uint64_t seed0, uint64_t seed1);

uint64_t Hash64WithSeed(const char *s, size_t len, uint64_t seed) {
  return Hash64WithSeeds(s, len, k2, seed);
}

uint64_t Hash64WithSeeds(const char *s, size_t len, uint64_t seed0, uint64_t seed1) {
  return HashLen16(Hash64(s, len) - seed0, seed1);
}
}  // namespace farmhashna
namespace farmhashmk {
#undef Fetch
#define Fetch Fetch32

#undef Rotate
#define Rotate Rotate32

#undef Bswap
#define Bswap Bswap32

STATIC_INLINE uint32_t Hash32Len13to24(const char *s, size_t len, uint32_t seed = 0) {
  uint32_t a = Fetch(s - 4 + (len >> 1));
  uint32_t b = Fetch(s + 4);
  uint32_t c = Fetch(s + len - 8);
  uint32_t d = Fetch(s + (len >> 1));
  uint32_t e = Fetch(s);
  uint32_t f = Fetch(s + len - 4);
  uint32_t h = d * c1 + len + seed;
  a = Rotate(a, 12) + f;
  h = Mur(c, h) + a;
  a = Rotate(a, 3) + c;
  h = Mur(e, h) + a;
  a = Rotate(a + f, 12) + d;
  h = Mur(b ^ seed, h) + a;
  return fmix(h);
}

STATIC_INLINE uint32_t Hash32Len0to4(const char *s, size_t len, uint32_t seed = 0) {
  uint32_t b = seed;
  uint32_t c = 9;
  for (size_t i = 0; i < len; i++) {
    signed char v = s[i];
    b = b * c1 + v;
    c ^= b;
  }
  return fmix(Mur(b, Mur(len, c)));
}

STATIC_INLINE uint32_t Hash32Len5to12(const char *s, size_t len, uint32_t seed = 0) {
  uint32_t a = len, b = len * 5, c = 9, d = b + seed;
  a += Fetch(s);
  b += Fetch(s + len - 4);
  c += Fetch(s + ((len >> 1) & 4));
  return fmix(seed ^ Mur(c, Mur(b, Mur(a, d))));
}

uint32_t Hash32(const char *s, size_t len) {
  if (len <= 24) {
    return len <= 12 ?
        (len <= 4 ? Hash32Len0to4(s, len) : Hash32Len5to12(s, len)) :
        Hash32Len13to24(s, len);
  }

  // len > 24
  uint32_t h = len, g = c1 * len, f = g;
  uint32_t a0 = Rotate(Fetch(s + len - 4) * c1, 17) * c2;
  uint32_t a1 = Rotate(Fetch(s + len - 8) * c1, 17) * c2;
  uint32_t a2 = Rotate(Fetch(s + len - 16) * c1, 17) * c2;
  uint32_t a3 = Rotate(Fetch(s + len - 12) * c1, 17) * c2;
  uint32_t a4 = Rotate(Fetch(s + len - 20) * c1, 17) * c2;
  h ^= a0;
  h = Rotate(h, 19);
  h = h * 5 + 0xe6546b64;
  h ^= a2;
  h = Rotate(h, 19);
  h = h * 5 + 0xe6546b64;
  g ^= a1;
  g = Rotate(g, 19);
  g = g * 5 + 0xe6546b64;
  g ^= a3;
  g = Rotate(g, 19);
  g = g * 5 + 0xe6546b64;
  f += a4;
  f = Rotate(f, 19) + 113;
  size_t iters = (len - 1) / 20;
  do {
    uint32_t a = Fetch(s);
    uint32_t b = Fetch(s + 4);
    uint32_t c = Fetch(s + 8);
    uint32_t d = Fetch(s + 12);
    uint32_t e = Fetch(s + 16);
    h += a;
    g += b;
    f += c;
    h = Mur(d, h) + e;
    g = Mur(c, g) + a;
    f = Mur(b + e * c1, f) + d;
    f += g;
    g += f;
    s += 20;
  } while (--iters != 0);
  g = Rotate(g, 11) * c1;
  g = Rotate(g, 17) * c1;
  f = Rotate(f, 11) * c1;
  f = Rotate(f, 17) * c1;
  h = Rotate(h + g, 19);
  h = h * 5 + 0xe6546b64;
  h = Rotate(h, 17) * c1;
  h = Rotate(h + f, 19);
  h = h * 5 + 0xe6546b64;
  h = Rotate(h, 17) * c1;
  return h;
}

uint32_t Hash32WithSeed(const char *s, size_t len, uint32_t seed) {
  if (len <= 24) {
    if (len >= 13) return Hash32Len13to24(s, len, seed * c1);
    else if (len >= 5) return Hash32Len5to12(s, len, seed);
    else return Hash32Len0to4(s, len, seed);
  }
  uint32_t h = Hash32Len13to24(s, 24, seed ^ len);
  return Mur(Hash32(s + 24, len - 24) + seed, h);
}
}  // namespace farmhashmk
namespace farmhashsu {
#if !can_use_sse42 || !can_use_aesni

uint32_t Hash32(const char *s, size_t len) {
  FARMHASH_DIE_IF_MISCONFIGURED;
  return s == nullptr ? 0 : len;
}

uint32_t Hash32WithSeed(const char *s, size_t len, uint32_t seed) {
  FARMHASH_DIE_IF_MISCONFIGURED;
  return seed + Hash32(s, len);
}

#else

#undef Fetch
#define Fetch Fetch32

#undef Rotate
#define Rotate Rotate32

#undef Bswap
#define Bswap Bswap32

// Helpers for data-parallel operations (4x 32-bits).
STATIC_INLINE __m128i Add(__m128i x, __m128i y) { return _mm_add_epi32(x, y); }
STATIC_INLINE __m128i Xor(__m128i x, __m128i y) { return _mm_xor_si128(x, y); }
STATIC_INLINE __m128i Or(__m128i x, __m128i y) { return _mm_or_si128(x, y); }
STATIC_INLINE __m128i Mul(__m128i x, __m128i y) { return _mm_mullo_epi32(x, y); }
STATIC_INLINE __m128i Mul5(__m128i x) { return Add(x, _mm_slli_epi32(x, 2)); }
STATIC_INLINE __m128i Rotate(__m128i x, int c) {
  return Or(_mm_slli_epi32(x, c),
            _mm_srli_epi32(x, 32 - c));
}
STATIC_INLINE __m128i Rot17(__m128i x) { return Rotate(x, 17); }
STATIC_INLINE __m128i Rot19(__m128i x) { return Rotate(x, 19); }
STATIC_INLINE __m128i Shuffle0321(__m128i x) {
  return _mm_shuffle_epi32(x, (0 << 6) + (3 << 4) + (2 << 2) + (1 << 0));
}
STATIC_INLINE __m128i Shuffle2031(__m128i x) {
  return _mm_shuffle_epi32(x, (2 << 6) + (0 << 4) + (3 << 2) + (1 << 0));
}

uint32_t Hash32(const char *s, size_t len) {
  const uint32_t seed = 81;
  if (len <= 24) {
    return len <= 12 ?
        (len <= 4 ?
         farmhashmk::Hash32Len0to4(s, len) :
         farmhashmk::Hash32Len5to12(s, len)) :
        farmhashmk::Hash32Len13to24(s, len);
  }

  if (len < 40) {
    uint32_t a = len, b = seed * c2, c = a + b;
    a += Fetch(s + len - 4);
    b += Fetch(s + len - 20);
    c += Fetch(s + len - 16);
    uint32_t d = a;
    a = NAMESPACE_FOR_HASH_FUNCTIONS::Rotate32(a, 21);
    a = Mur(a, Mur(b, _mm_crc32_u32(c, d)));
    a += Fetch(s + len - 12);
    b += Fetch(s + len - 8);
    d += a;
    a += d;
    b = Mur(b, d) * c2;
    a = _mm_crc32_u32(a, b + c);
    return farmhashmk::Hash32Len13to24(s, (len + 1) / 2, a) + b;
  }

#undef Mulc1
#define Mulc1(x) Mul((x), cc1)

#undef Mulc2
#define Mulc2(x) Mul((x), cc2)

#undef Murk
#define Murk(a, h)                              \
  Add(k,                                        \
      Mul5(                                     \
          Rot19(                                \
              Xor(                              \
                  Mulc2(                        \
                      Rot17(                    \
                          Mulc1(a))),           \
                  (h)))))

  const __m128i cc1 = _mm_set1_epi32(c1);
  const __m128i cc2 = _mm_set1_epi32(c2);
  __m128i h = _mm_set1_epi32(seed);
  __m128i g = _mm_set1_epi32(c1 * seed);
  __m128i f = g;
  __m128i k = _mm_set1_epi32(0xe6546b64);
  __m128i q;
  if (len < 80) {
    __m128i a = Load128(s);
    __m128i b = Load128(s + 16);
    __m128i c = Load128(s + (len - 15) / 2);
    __m128i d = Load128(s + len - 32);
    __m128i e = Load128(s + len - 16);
    h = Add(h, a);
    g = Add(g, b);
    q = g;
    g = Shuffle0321(g);
    f = Add(f, c);
    __m128i be = Add(b, Mulc1(e));
    h = Add(h, f);
    f = Add(f, h);
    h = Add(Murk(d, h), e);
    k = Xor(k, _mm_shuffle_epi8(g, f));
    g = Add(Xor(c, g), a);
    f = Add(Xor(be, f), d);
    k = Add(k, be);
    k = Add(k, _mm_shuffle_epi8(f, h));
    f = Add(f, g);
    g = Add(g, f);
    g = Add(_mm_set1_epi32(len), Mulc1(g));
  } else {
    // len >= 80
    // The following is loosely modelled after farmhashmk::Hash32.
    size_t iters = (len - 1) / 80;
    len -= iters * 80;

#undef Chunk
#define Chunk() do {                            \
  __m128i a = Load128(s);                       \
  __m128i b = Load128(s + 16);                  \
  __m128i c = Load128(s + 32);                  \
  __m128i d = Load128(s + 48);                  \
  __m128i e = Load128(s + 64);                  \
  h = Add(h, a);                                \
  g = Add(g, b);                                \
  g = Shuffle0321(g);                           \
  f = Add(f, c);                                \
  __m128i be = Add(b, Mulc1(e));                \
  h = Add(h, f);                                \
  f = Add(f, h);                                \
  h = Add(h, d);                                \
  q = Add(q, e);                                \
  h = Rot17(h);                                 \
  h = Mulc1(h);                                 \
  k = Xor(k, _mm_shuffle_epi8(g, f));           \
  g = Add(Xor(c, g), a);                        \
  f = Add(Xor(be, f), d);                       \
  std::swap(f, q);                              \
  q = _mm_aesimc_si128(q);                      \
  k = Add(k, be);                               \
  k = Add(k, _mm_shuffle_epi8(f, h));           \
  f = Add(f, g);                                \
  g = Add(g, f);                                \
  f = Mulc1(f);                                 \
} while (0)

    q = g;
    while (iters-- != 0) {
      Chunk();
      s += 80;
    }

    if (len != 0) {
      h = Add(h, _mm_set1_epi32(len));
      s = s + len - 80;
      Chunk();
    }
  }

  g = Shuffle0321(g);
  k = Xor(k, g);
  k = Xor(k, q);
  h = Xor(h, q);
  f = Mulc1(f);
  k = Mulc2(k);
  g = Mulc1(g);
  h = Mulc2(h);
  k = Add(k, _mm_shuffle_epi8(g, f));
  h = Add(h, f);
  f = Add(f, h);
  g = Add(g, k);
  k = Add(k, g);
  k = Xor(k, _mm_shuffle_epi8(f, h));
  __m128i buf[4];
  buf[0] = f;
  buf[1] = g;
  buf[2] = k;
  buf[3] = h;
  s = reinterpret_cast<char*>(buf);
  uint32_t x = Fetch(s);
  uint32_t y = Fetch(s+4);
  uint32_t z = Fetch(s+8);
  x = _mm_crc32_u32(x, Fetch(s+12));
  y = _mm_crc32_u32(y, Fetch(s+16));
  z = _mm_crc32_u32(z * c1, Fetch(s+20));
  x = _mm_crc32_u32(x, Fetch(s+24));
  y = _mm_crc32_u32(y * c1, Fetch(s+28));
  uint32_t o = y;
  z = _mm_crc32_u32(z, Fetch(s+32));
  x = _mm_crc32_u32(x * c1, Fetch(s+36));
  y = _mm_crc32_u32(y, Fetch(s+40));
  z = _mm_crc32_u32(z * c1, Fetch(s+44));
  x = _mm_crc32_u32(x, Fetch(s+48));
  y = _mm_crc32_u32(y * c1, Fetch(s+52));
  z = _mm_crc32_u32(z, Fetch(s+56));
  x = _mm_crc32_u32(x, Fetch(s+60));
  return (o - x + y - z) * c1;
}

#undef Chunk
#undef Murk
#undef Mulc2
#undef Mulc1

uint32_t Hash32WithSeed(const char *s, size_t len, uint32_t seed) {
  if (len <= 24) {
    if (len >= 13) return farmhashmk::Hash32Len13to24(s, len, seed * c1);
    else if (len >= 5) return farmhashmk::Hash32Len5to12(s, len, seed);
    else return farmhashmk::Hash32Len0to4(s, len, seed);
  }
  uint32_t h = farmhashmk::Hash32Len13to24(s, 24, seed ^ len);
  return _mm_crc32_u32(Hash32(s + 24, len - 24) + seed, h);
}

#endif
}  // namespace farmhashsu
namespace farmhashns {
#if !can_use_sse42 || !can_use_aesni || !x86_64

uint32_t Hash32(const char *s, size_t len) {
  FARMHASH_DIE_IF_MISCONFIGURED;
  return s == nullptr ? 0 : len;
}

uint32_t Hash32WithSeed(const char *s, size_t len, uint32_t seed) {
  FARMHASH_DIE_IF_MISCONFIGURED;
  return seed + Hash32(s, len);
}

#else

uint32_t Hash32(const char *s, size_t len) {
  return len <= 256 ?
      static_cast<uint32_t>(farmhashna::Hash64(s, len)) :
      farmhashsu::Hash32(s, len);
}

uint32_t Hash32WithSeed(const char *s, size_t len, uint32_t seed) {
  return len <= 256 ?
      static_cast<uint32_t>(farmhashna::Hash64WithSeed(s, len, seed)) :
      farmhashsu::Hash32WithSeed(s, len, seed);
}

#endif
}  // namespace farmhashns
namespace farmhashsa {
#if !can_use_sse42

uint32_t Hash32(const char *s, size_t len) {
  FARMHASH_DIE_IF_MISCONFIGURED;
  return s == nullptr ? 0 : len;
}

uint32_t Hash32WithSeed(const char *s, size_t len, uint32_t seed) {
  FARMHASH_DIE_IF_MISCONFIGURED;
  return seed + Hash32(s, len);
}

#else

#undef Fetch
#define Fetch Fetch32

#undef Rotate
#define Rotate Rotate32

#undef Bswap
#define Bswap Bswap32

// Helpers for data-parallel operations (4x 32-bits).
STATIC_INLINE __m128i Add(__m128i x, __m128i y) { return _mm_add_epi32(x, y); }
STATIC_INLINE __m128i Xor(__m128i x, __m128i y) { return _mm_xor_si128(x, y); }
STATIC_INLINE __m128i Or(__m128i x, __m128i y) { return _mm_or_si128(x, y); }
STATIC_INLINE __m128i Mul(__m128i x, __m128i y) { return _mm_mullo_epi32(x, y); }
STATIC_INLINE __m128i Mul5(__m128i x) { return Add(x, _mm_slli_epi32(x, 2)); }
STATIC_INLINE __m128i Rotate(__m128i x, int c) {
  return Or(_mm_slli_epi32(x, c),
            _mm_srli_epi32(x, 32 - c));
}
STATIC_INLINE __m128i Rot17(__m128i x) { return Rotate(x, 17); }
STATIC_INLINE __m128i Rot19(__m128i x) { return Rotate(x, 19); }
STATIC_INLINE __m128i Shuffle0321(__m128i x) {
  return _mm_shuffle_epi32(x, (0 << 6) + (3 << 4) + (2 << 2) + (1 << 0));
}

uint32_t Hash32(const char *s, size_t len) {
  const uint32_t seed = 81;
  if (len <= 24) {
    return len <= 12 ?
        (len <= 4 ?
         farmhashmk::Hash32Len0to4(s, len) :
         farmhashmk::Hash32Len5to12(s, len)) :
        farmhashmk::Hash32Len13to24(s, len);
  }

  if (len < 40) {
    uint32_t a = len, b = seed * c2, c = a + b;
    a += Fetch(s + len - 4);
    b += Fetch(s + len - 20);
    c += Fetch(s + len - 16);
    uint32_t d = a;
    a = NAMESPACE_FOR_HASH_FUNCTIONS::Rotate32(a, 21);
    a = Mur(a, Mur(b, Mur(c, d)));
    a += Fetch(s + len - 12);
    b += Fetch(s + len - 8);
    d += a;
    a += d;
    b = Mur(b, d) * c2;
    a = _mm_crc32_u32(a, b + c);
    return farmhashmk::Hash32Len13to24(s, (len + 1) / 2, a) + b;
  }

#undef Mulc1
#define Mulc1(x) Mul((x), cc1)

#undef Mulc2
#define Mulc2(x) Mul((x), cc2)

#undef Murk
#define Murk(a, h)                              \
  Add(k,                                        \
      Mul5(                                     \
          Rot19(                                \
              Xor(                              \
                  Mulc2(                        \
                      Rot17(                    \
                          Mulc1(a))),           \
                  (h)))))

  const __m128i cc1 = _mm_set1_epi32(c1);
  const __m128i cc2 = _mm_set1_epi32(c2);
  __m128i h = _mm_set1_epi32(seed);
  __m128i g = _mm_set1_epi32(c1 * seed);
  __m128i f = g;
  __m128i k = _mm_set1_epi32(0xe6546b64);
  if (len < 80) {
    __m128i a = Load128(s);
    __m128i b = Load128(s + 16);
    __m128i c = Load128(s + (len - 15) / 2);
    __m128i d = Load128(s + len - 32);
    __m128i e = Load128(s + len - 16);
    h = Add(h, a);
    g = Add(g, b);
    g = Shuffle0321(g);
    f = Add(f, c);
    __m128i be = Add(b, Mulc1(e));
    h = Add(h, f);
    f = Add(f, h);
    h = Add(Murk(d, h), e);
    k = Xor(k, _mm_shuffle_epi8(g, f));
    g = Add(Xor(c, g), a);
    f = Add(Xor(be, f), d);
    k = Add(k, be);
    k = Add(k, _mm_shuffle_epi8(f, h));
    f = Add(f, g);
    g = Add(g, f);
    g = Add(_mm_set1_epi32(len), Mulc1(g));
  } else {
    // len >= 80
    // The following is loosely modelled after farmhashmk::Hash32.
    size_t iters = (len - 1) / 80;
    len -= iters * 80;

#undef Chunk
#define Chunk() do {                            \
  __m128i a = Load128(s);                       \
  __m128i b = Load128(s + 16);                  \
  __m128i c = Load128(s + 32);                  \
  __m128i d = Load128(s + 48);                  \
  __m128i e = Load128(s + 64);                  \
  h = Add(h, a);                                \
  g = Add(g, b);                                \
  g = Shuffle0321(g);                           \
  f = Add(f, c);                                \
  __m128i be = Add(b, Mulc1(e));                \
  h = Add(h, f);                                \
  f = Add(f, h);                                \
  h = Add(Murk(d, h), e);                       \
  k = Xor(k, _mm_shuffle_epi8(g, f));           \
  g = Add(Xor(c, g), a);                        \
  f = Add(Xor(be, f), d);                       \
  k = Add(k, be);                               \
  k = Add(k, _mm_shuffle_epi8(f, h));           \
  f = Add(f, g);                                \
  g = Add(g, f);                                \
  f = Mulc1(f);                                 \
} while (0)

    while (iters-- != 0) {
      Chunk();
      s += 80;
    }

    if (len != 0) {
      h = Add(h, _mm_set1_epi32(len));
      s = s + len - 80;
      Chunk();
    }
  }

  g = Shuffle0321(g);
  k = Xor(k, g);
  f = Mulc1(f);
  k = Mulc2(k);
  g = Mulc1(g);
  h = Mulc2(h);
  k = Add(k, _mm_shuffle_epi8(g, f));
  h = Add(h, f);
  f = Add(f, h);
  g = Add(g, k);
  k = Add(k, g);
  k = Xor(k, _mm_shuffle_epi8(f, h));
  __m128i buf[4];
  buf[0] = f;
  buf[1] = g;
  buf[2] = k;
  buf[3] = h;
  s = reinterpret_cast<char*>(buf);
  uint32_t x = Fetch(s);
  uint32_t y = Fetch(s+4);
  uint32_t z = Fetch(s+8);
  x = _mm_crc32_u32(x, Fetch(s+12));
  y = _mm_crc32_u32(y, Fetch(s+16));
  z = _mm_crc32_u32(z * c1, Fetch(s+20));
  x = _mm_crc32_u32(x, Fetch(s+24));
  y = _mm_crc32_u32(y * c1, Fetch(s+28));
  uint32_t o = y;
  z = _mm_crc32_u32(z, Fetch(s+32));
  x = _mm_crc32_u32(x * c1, Fetch(s+36));
  y = _mm_crc32_u32(y, Fetch(s+40));
  z = _mm_crc32_u32(z * c1, Fetch(s+44));
  x = _mm_crc32_u32(x, Fetch(s+48));
  y = _mm_crc32_u32(y * c1, Fetch(s+52));
  z = _mm_crc32_u32(z, Fetch(s+56));
  x = _mm_crc32_u32(x, Fetch(s+60));
  return (o - x + y - z) * c1;
}

#undef Chunk
#undef Murk
#undef Mulc2
#undef Mulc1

uint32_t Hash32WithSeed(const char *s, size_t len, uint32_t seed) {
  if (len <= 24) {
    if (len >= 13) return farmhashmk::Hash32Len13to24(s, len, seed * c1);
    else if (len >= 5) return farmhashmk::Hash32Len5to12(s, len, seed);
    else return farmhashmk::Hash32Len0to4(s, len, seed);
  }
  uint32_t h = farmhashmk::Hash32Len13to24(s, 24, seed ^ len);
  return _mm_crc32_u32(Hash32(s + 24, len - 24) + seed, h);
}

#endif
}  // namespace farmhashsa
namespace farmhashcc {
// This file provides a 32-bit hash equivalent to CityHash32 (v1.1.1)
// and a 128-bit hash equivalent to CityHash128 (v1.1.1).  It also provides
// a seeded 32-bit hash function similar to CityHash32.

#undef Fetch
#define Fetch Fetch32

#undef Rotate
#define Rotate Rotate32

#undef Bswap
#define Bswap Bswap32

STATIC_INLINE uint32_t Hash32Len13to24(const char *s, size_t len) {
  uint32_t a = Fetch(s - 4 + (len >> 1));
  uint32_t b = Fetch(s + 4);
  uint32_t c = Fetch(s + len - 8);
  uint32_t d = Fetch(s + (len >> 1));
  uint32_t e = Fetch(s);
  uint32_t f = Fetch(s + len - 4);
  uint32_t h = len;

  return fmix(Mur(f, Mur(e, Mur(d, Mur(c, Mur(b, Mur(a, h)))))));
}

STATIC_INLINE uint32_t Hash32Len0to4(const char *s, size_t len) {
  uint32_t b = 0;
  uint32_t c = 9;
  for (size_t i = 0; i < len; i++) {
    signed char v = s[i];
    b = b * c1 + v;
    c ^= b;
  }
  return fmix(Mur(b, Mur(len, c)));
}

STATIC_INLINE uint32_t Hash32Len5to12(const char *s, size_t len) {
  uint32_t a = len, b = len * 5, c = 9, d = b;
  a += Fetch(s);
  b += Fetch(s + len - 4);
  c += Fetch(s + ((len >> 1) & 4));
  return fmix(Mur(c, Mur(b, Mur(a, d))));
}

uint32_t Hash32(const char *s, size_t len) {
  if (len <= 24) {
    return len <= 12 ?
        (len <= 4 ? Hash32Len0to4(s, len) : Hash32Len5to12(s, len)) :
        Hash32Len13to24(s, len);
  }

  // len > 24
  uint32_t h = len, g = c1 * len, f = g;
  uint32_t a0 = Rotate(Fetch(s + len - 4) * c1, 17) * c2;
  uint32_t a1 = Rotate(Fetch(s + len - 8) * c1, 17) * c2;
  uint32_t a2 = Rotate(Fetch(s + len - 16) * c1, 17) * c2;
  uint32_t a3 = Rotate(Fetch(s + len - 12) * c1, 17) * c2;
  uint32_t a4 = Rotate(Fetch(s + len - 20) * c1, 17) * c2;
  h ^= a0;
  h = Rotate(h, 19);
  h = h * 5 + 0xe6546b64;
  h ^= a2;
  h = Rotate(h, 19);
  h = h * 5 + 0xe6546b64;
  g ^= a1;
  g = Rotate(g, 19);
  g = g * 5 + 0xe6546b64;
  g ^= a3;
  g = Rotate(g, 19);
  g = g * 5 + 0xe6546b64;
  f += a4;
  f = Rotate(f, 19);
  f = f * 5 + 0xe6546b64;
  size_t iters = (len - 1) / 20;
  do {
    uint32_t a0 = Rotate(Fetch(s) * c1, 17) * c2;
    uint32_t a1 = Fetch(s + 4);
    uint32_t a2 = Rotate(Fetch(s + 8) * c1, 17) * c2;
    uint32_t a3 = Rotate(Fetch(s + 12) * c1, 17) * c2;
    uint32_t a4 = Fetch(s + 16);
    h ^= a0;
    h = Rotate(h, 18);
    h = h * 5 + 0xe6546b64;
    f += a1;
    f = Rotate(f, 19);
    f = f * c1;
    g += a2;
    g = Rotate(g, 18);
    g = g * 5 + 0xe6546b64;
    h ^= a3 + a1;
    h = Rotate(h, 19);
    h = h * 5 + 0xe6546b64;
    g ^= a4;
    g = Bswap(g) * 5;
    h += a4 * 5;
    h = Bswap(h);
    f += a0;
    PERMUTE3(f, h, g);
    s += 20;
  } while (--iters != 0);
  g = Rotate(g, 11) * c1;
  g = Rotate(g, 17) * c1;
  f = Rotate(f, 11) * c1;
  f = Rotate(f, 17) * c1;
  h = Rotate(h + g, 19);
  h = h * 5 + 0xe6546b64;
  h = Rotate(h, 17) * c1;
  h = Rotate(h + f, 19);
  h = h * 5 + 0xe6546b64;
  h = Rotate(h, 17) * c1;
  return h;
}

uint32_t Hash32WithSeed(const char *s, size_t len, uint32_t seed) {
  if (len <= 24) {
    if (len >= 13) return farmhashmk::Hash32Len13to24(s, len, seed * c1);
    else if (len >= 5) return farmhashmk::Hash32Len5to12(s, len, seed);
    else return farmhashmk::Hash32Len0to4(s, len, seed);
  }
  uint32_t h = farmhashmk::Hash32Len13to24(s, 24, seed ^ len);
  return Mur(Hash32(s + 24, len - 24) + seed, h);
}

#undef Fetch
#define Fetch Fetch64

#undef Rotate
#define Rotate Rotate64

#undef Bswap
#define Bswap Bswap64

STATIC_INLINE uint64_t ShiftMix(uint64_t val) {
  return val ^ (val >> 47);
}

STATIC_INLINE uint64_t HashLen16(uint64_t u, uint64_t v) {
  return Hash128to64(Uint128(u, v));
}

STATIC_INLINE uint64_t HashLen16(uint64_t u, uint64_t v, uint64_t mul) {
  // Murmur-inspired hashing.
  uint64_t a = (u ^ v) * mul;
  a ^= (a >> 47);
  uint64_t b = (v ^ a) * mul;
  b ^= (b >> 47);
  b *= mul;
  return b;
}

STATIC_INLINE uint64_t HashLen0to16(const char *s, size_t len) {
  if (len >= 8) {
    uint64_t mul = k2 + len * 2;
    uint64_t a = Fetch(s) + k2;
    uint64_t b = Fetch(s + len - 8);
    uint64_t c = Rotate(b, 37) * mul + a;
    uint64_t d = (Rotate(a, 25) + b) * mul;
    return HashLen16(c, d, mul);
  }
  if (len >= 4) {
    uint64_t mul = k2 + len * 2;
    uint64_t a = Fetch32(s);
    return HashLen16(len + (a << 3), Fetch32(s + len - 4), mul);
  }
  if (len > 0) {
    uint8_t a = s[0];
    uint8_t b = s[len >> 1];
    uint8_t c = s[len - 1];
    uint32_t y = static_cast<uint32_t>(a) + (static_cast<uint32_t>(b) << 8);
    uint32_t z = len + (static_cast<uint32_t>(c) << 2);
    return ShiftMix(y * k2 ^ z * k0) * k2;
  }
  return k2;
}

// Return a 16-byte hash for 48 bytes.  Quick and dirty.
// Callers do best to use "random-looking" values for a and b.
STATIC_INLINE pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
    uint64_t w, uint64_t x, uint64_t y, uint64_t z, uint64_t a, uint64_t b) {
  a += w;
  b = Rotate(b + a + z, 21);
  uint64_t c = a;
  a += x;
  a += y;
  b += Rotate(a, 44);
  return std::make_pair(a + z, b + c);
}

// Return a 16-byte hash for s[0] ... s[31], a, and b.  Quick and dirty.
STATIC_INLINE pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
    const char* s, uint64_t a, uint64_t b) {
  return WeakHashLen32WithSeeds(Fetch(s),
                                Fetch(s + 8),
                                Fetch(s + 16),
                                Fetch(s + 24),
                                a,
                                b);
}



// A subroutine for CityHash128().  Returns a decent 128-bit hash for strings
// of any length representable in signed long.  Based on City and Murmur.
STATIC_INLINE uint128_t CityMurmur(const char *s, size_t len, uint128_t seed) {
  uint64_t a = Uint128Low64(seed);
  uint64_t b = Uint128High64(seed);
  uint64_t c = 0;
  uint64_t d = 0;
  signed long l = len - 16;
  if (l <= 0) {  // len <= 16
    a = ShiftMix(a * k1) * k1;
    c = b * k1 + HashLen0to16(s, len);
    d = ShiftMix(a + (len >= 8 ? Fetch(s) : c));
  } else {  // len > 16
    c = HashLen16(Fetch(s + len - 8) + k1, a);
    d = HashLen16(b + len, c + Fetch(s + len - 16));
    a += d;
    do {
      a ^= ShiftMix(Fetch(s) * k1) * k1;
      a *= k1;
      b ^= a;
      c ^= ShiftMix(Fetch(s + 8) * k1) * k1;
      c *= k1;
      d ^= c;
      s += 16;
      l -= 16;
    } while (l > 0);
  }
  a = HashLen16(a, c);
  b = HashLen16(d, b);
  return uint128_t(a ^ b, HashLen16(b, a));
}

uint128_t CityHash128WithSeed(const char *s, size_t len, uint128_t seed) {
  if (len < 128) {
    return CityMurmur(s, len, seed);
  }

  // We expect len >= 128 to be the common case.  Keep 56 bytes of state:
  // v, w, x, y, and z.
  pair<uint64_t, uint64_t> v, w;
  uint64_t x = Uint128Low64(seed);
  uint64_t y = Uint128High64(seed);
  uint64_t z = len * k1;
  v.first = Rotate(y ^ k1, 49) * k1 + Fetch(s);
  v.second = Rotate(v.first, 42) * k1 + Fetch(s + 8);
  w.first = Rotate(y + z, 35) * k1 + x;
  w.second = Rotate(x + Fetch(s + 88), 53) * k1;

  // This is the same inner loop as CityHash64(), manually unrolled.
  do {
    x = Rotate(x + y + v.first + Fetch(s + 8), 37) * k1;
    y = Rotate(y + v.second + Fetch(s + 48), 42) * k1;
    x ^= w.second;
    y += v.first + Fetch(s + 40);
    z = Rotate(z + w.first, 33) * k1;
    v = WeakHashLen32WithSeeds(s, v.second * k1, x + w.first);
    w = WeakHashLen32WithSeeds(s + 32, z + w.second, y + Fetch(s + 16));
    std::swap(z, x);
    s += 64;
    x = Rotate(x + y + v.first + Fetch(s + 8), 37) * k1;
    y = Rotate(y + v.second + Fetch(s + 48), 42) * k1;
    x ^= w.second;
    y += v.first + Fetch(s + 40);
    z = Rotate(z + w.first, 33) * k1;
    v = WeakHashLen32WithSeeds(s, v.second * k1, x + w.first);
    w = WeakHashLen32WithSeeds(s + 32, z + w.second, y + Fetch(s + 16));
    std::swap(z, x);
    s += 64;
    len -= 128;
  } while (LIKELY(len >= 128));
  x += Rotate(v.first + z, 49) * k0;
  y = y * k0 + Rotate(w.second, 37);
  z = z * k0 + Rotate(w.first, 27);
  w.first *= 9;
  v.first *= k0;
  // If 0 < len < 128, hash up to 4 chunks of 32 bytes each from the end of s.
  for (size_t tail_done = 0; tail_done < len; ) {
    tail_done += 32;
    y = Rotate(x + y, 42) * k0 + v.second;
    w.first += Fetch(s + len - tail_done + 16);
    x = x * k0 + w.first;
    z += w.second + Fetch(s + len - tail_done);
    w.second += v.first;
    v = WeakHashLen32WithSeeds(s + len - tail_done, v.first + z, v.second);
    v.first *= k0;
  }
  // At this point our 56 bytes of state should contain more than
  // enough information for a strong 128-bit hash.  We use two
  // different 56-byte-to-8-byte hashes to get a 16-byte final result.
  x = HashLen16(x, v.first);
  y = HashLen16(y + z, w.first);
  return uint128_t(HashLen16(x + v.second, w.second) + y,
                   HashLen16(x + w.second, y + v.second));
}

STATIC_INLINE uint128_t CityHash128(const char *s, size_t len) {
  return len >= 16 ?
      CityHash128WithSeed(s + 16, len - 16,
                          uint128_t(Fetch(s), Fetch(s + 8) + k0)) :
      CityHash128WithSeed(s, len, uint128_t(k0, k1));
}

uint128_t Fingerprint128(const char* s, size_t len) {
  return CityHash128(s, len);
}
}  // namespace farmhashcc

// BASIC STRING HASHING

// Hash function for a byte array.  See also Hash(), below.
// May change from time to time, may differ on different platforms, may differ
// depending on NDEBUG.
uint32_t Hash32(const char* s, size_t len) {
  if (can_use_sse42 & can_use_aesni & x86_64)
    return DebugTweak(farmhashns::Hash32(s, len));

  return DebugTweak(
      (can_use_sse42 & can_use_aesni) ?
      farmhashsu::Hash32(s, len) :
      can_use_sse42 ?
      farmhashsa::Hash32(s, len) :
      farmhashmk::Hash32(s, len));
}

// Hash function for a byte array.  For convenience, a 32-bit seed is also
// hashed into the result.
// May change from time to time, may differ on different platforms, may differ
// depending on NDEBUG.
uint32_t Hash32WithSeed(const char* s, size_t len, uint32_t seed) {
  if (can_use_sse42 & can_use_aesni & x86_64)
    return DebugTweak(farmhashns::Hash32WithSeed(s, len, seed));

  return DebugTweak(
      (can_use_sse42 & can_use_aesni) ?
      farmhashsu::Hash32WithSeed(s, len, seed) :
      can_use_sse42 ?
      farmhashsa::Hash32WithSeed(s, len, seed) :
      farmhashmk::Hash32WithSeed(s, len, seed));
}

// Hash function for a byte array.  For convenience, a 64-bit seed is also
// hashed into the result.  See also Hash(), below.
// May change from time to time, may differ on different platforms, may differ
// depending on NDEBUG.
uint64_t Hash64(const char* s, size_t len) {
  return DebugTweak(farmhashna::Hash64(s, len));
}

// Hash function for a byte array.
// May change from time to time, may differ on different platforms, may differ
// depending on NDEBUG.
size_t Hash(const char* s, size_t len) {
  return sizeof(size_t) == 8 ? Hash64(s, len) : Hash32(s, len);
}

// Hash function for a byte array.  For convenience, a 64-bit seed is also
// hashed into the result.
// May change from time to time, may differ on different platforms, may differ
// depending on NDEBUG.
uint64_t Hash64WithSeed(const char* s, size_t len, uint64_t seed) {
  return DebugTweak(farmhashna::Hash64WithSeed(s, len, seed));
}

// Hash function for a byte array.  For convenience, two seeds are also
// hashed into the result.
// May change from time to time, may differ on different platforms, may differ
// depending on NDEBUG.
uint64_t Hash64WithSeeds(const char* s, size_t len, uint64_t seed0, uint64_t seed1) {
  return DebugTweak(farmhashna::Hash64WithSeeds(s, len, seed0, seed1));
}

// Hash function for a byte array.
// May change from time to time, may differ on different platforms, may differ
// depending on NDEBUG.
uint128_t Hash128(const char* s, size_t len) {
  return DebugTweak(farmhashcc::Fingerprint128(s, len));
}

// Hash function for a byte array.  For convenience, a 128-bit seed is also
// hashed into the result.
// May change from time to time, may differ on different platforms, may differ
// depending on NDEBUG.
uint128_t Hash128WithSeed(const char* s, size_t len, uint128_t seed) {
  return DebugTweak(farmhashcc::CityHash128WithSeed(s, len, seed));
}

// BASIC NON-STRING HASHING

// FINGERPRINTING (i.e., good, portable, forever-fixed hash functions)

// Fingerprint function for a byte array.  Most useful in 32-bit binaries.
uint32_t Fingerprint32(const char* s, size_t len) {
  return farmhashmk::Hash32(s, len);
}

// Fingerprint function for a byte array.
uint64_t Fingerprint64(const char* s, size_t len) {
  return farmhashna::Hash64(s, len);
}

// Fingerprint function for a byte array.
uint128_t Fingerprint128(const char* s, size_t len) {
  return farmhashcc::Fingerprint128(s, len);
}

}  // namespace NAMESPACE_FOR_HASH_FUNCTIONS

#if FARMHASHSELFTEST

#ifndef FARMHASH_SELF_TEST_GUARD
#define FARMHASH_SELF_TEST_GUARD
#include <string.h>
#include <cstdio>
#include <iostream>

using std::cout;
using std::cerr;
using std::endl;
using std::hex;

static const uint64_t kSeed0 = 1234567;
static const uint64_t kSeed1 = k0;
static const int kDataSize = 1 << 20;
static const int kTestSize = 300;
#define kSeed128 Uint128(kSeed0, kSeed1)

static char data[kDataSize];

static int completed_self_tests = 0;
static int errors = 0;

// Initialize data to pseudorandom values.
void Setup() {
  if (completed_self_tests == 0) {
    uint64_t a = 9;
    uint64_t b = 777;
    for (int i = 0; i < kDataSize; i++) {
      a += b;
      b += a;
      a = (a ^ (a >> 41)) * k0;
      b = (b ^ (b >> 41)) * k0 + i;
      uint8_t u = b >> 37;
      memcpy(data + i, &u, 1);  // uint8_t -> char
    }
  }
}

int NoteErrors() {
#define NUM_SELF_TESTS 6
  if (++completed_self_tests == NUM_SELF_TESTS)
    std::exit(errors > 0);
  return errors;
}

template <typename T> inline bool IsNonZero(T x) {
  return x != 0;
}

template <> inline bool IsNonZero<uint128_t>(uint128_t x) {
  return x != Uint128(0, 0);
}

#endif  // FARMHASH_SELF_TEST_GUARD

namespace farmhashccTest {

uint32_t CreateSeed(int offset, int salt) {
  uint32_t h = static_cast<uint32_t>(salt & 0xffffffff);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h += static_cast<uint32_t>(offset & 0xffffffff);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  return h;
}

#undef SEED
#undef SEED1
#undef SEED0
#define SEED CreateSeed(offset, -1)
#define SEED0 CreateSeed(offset, 0)
#define SEED1 CreateSeed(offset, 1)

#undef TESTING
#define TESTING 1
#if TESTING
uint32_t expected[] = {
4223616069u,
3696677242u,
1039179260u, 1690343979u, 1018511555u, 2464489001u,
20368522u, 2663783964u, 175201532u, 1619210592u,
4081014168u,
2576519988u,
3285042206u, 502478099u, 739479538u, 1500332790u,
13754768u, 3789353455u, 3473868058u, 1909255088u,
2212771159u,
1112731063u,
826915357u, 2893489933u, 118369799u, 1848668220u,
1308219822u, 249416982u, 64306364u, 4221800195u,
1020067935u,
3955445564u,
563346294u, 550236731u, 2339016688u, 1826259714u,
3872358639u, 2295981050u, 1870005390u, 4015628802u,
1451961420u,
653440099u,
1292493871u, 164377749u, 1717712483u, 463414587u,
3924343675u, 1050492084u, 3566618804u, 2046983362u,
31917516u,
2957164615u,
230718965u, 999595115u, 3534822176u, 2175709186u,
965707431u, 441796222u, 2481718051u, 1827777486u,
2590087362u,
3879448744u,
3515079898u, 1601433082u, 982764532u, 254808716u,
1293372530u, 4205605817u, 947001462u, 1138890052u,
176305566u,
2447367541u,
2973802542u, 4123621138u, 3083865840u, 1706367795u,
792114347u, 2880110657u, 440613768u, 195054868u,
1359016305u,
3363804638u,
649488537u, 1624045597u, 1441938215u, 3147758996u,
3199173578u, 2597283203u, 2191333609u, 3763129144u,
1117290165u,
1062549743u,
2565615889u, 1046361554u, 1581968261u, 1058773671u,
1123053168u, 3807622275u, 1486749916u, 3900816089u,
2437877004u,
1894455839u,
1912520953u, 1914997013u, 561048608u, 1643267444u,
3671572006u, 194811086u, 1468911468u, 2179206286u,
673206794u,
3486923651u,
3741426466u, 3292160512u, 697001377u, 1900763774u,
3726097344u, 629282039u, 3578723715u, 2868028489u,
3269862919u,
2303349487u,
3643953525u, 2307255916u, 849996280u, 732080434u,
909961480u, 3542445214u, 2628347095u, 4236856917u,
1380660650u,
2631821908u,
2007289004u, 3509705198u, 3788541675u, 789457322u,
3090670546u, 638977894u, 3503881773u, 947102987u,
1525325287u,
1816697045u,
2706647405u, 288763142u, 3505438495u, 481308609u,
2882636782u, 3745162621u, 3503467033u, 428247823u,
176408838u,
333551502u,
1001068721u, 1681483651u, 75380831u, 4191469679u,
3627361839u, 2736617386u, 3120737438u, 1297502456u,
864896482u,
85674920u,
2886047255u, 4119881331u, 2496990525u, 3442502055u,
1806582817u, 3186345024u, 4099591287u, 2560171465u,
3489229104u,
3065015872u,
2755089808u, 3098442882u, 378524719u, 2664097023u,
1771960725u, 2901182183u, 55258521u, 1266621443u,
581644891u,
37790450u,
1800731704u, 3601350920u, 53428754u, 2759476837u,
3391093099u, 1496510311u, 2511119507u, 2636877410u,
631613207u,
1573846064u,
260484875u, 1088212603u, 2369525206u, 322522428u,
3191396600u, 2076543340u, 1552496658u, 2739811558u,
3867875546u,
2051584261u,
2126250818u, 901517871u, 3651631165u, 1323139145u,
1521111765u, 477802997u, 3508559783u, 383954241u,
3804516756u,
4250206331u,
2655954340u, 2484996477u, 1417544845u, 1520282298u,
2745204366u, 2869345147u, 1872738335u, 2592877343u,
1619744564u,
1804962124u,
3458679890u, 423948620u, 273645618u, 4187865426u,
376057175u, 2943431463u, 3581950599u, 1035398331u,
1088213445u,
861988903u,
1323370244u, 777069428u, 506235917u, 369720851u,
2789995854u, 230915180u, 1505086948u, 940361236u,
3727873235u,
1159167499u,
1860302871u, 3456858862u, 3923555152u, 2131072714u,
2910461068u, 3671950363u, 2010742682u, 4088068851u,
3616470388u,
2087714788u,
221675509u, 1230154072u, 3450704646u, 1463226695u,
1998357699u, 266026801u, 619568740u, 3560427266u,
4148162586u,
3150417316u,
1356375822u, 2056097622u, 627905802u, 3881675638u,
2309738053u, 971916703u, 3447805361u, 1673575328u,
673084328u,
3317849401u,
2836362782u, 2377208890u, 3275350588u, 158350552u,
2553241779u, 2497264995u, 3262882649u, 3897937187u,
1598963653u,
3068514414u,
601541505u, 374517071u, 3380795976u, 235752573u,
284670003u, 2990192160u, 904937105u, 2306579150u,
2117362589u,
1635274830u,
3355572906u, 170799903u, 1226685528u, 664567688u,
413219134u, 878324258u, 4026159448u, 3620649295u,
1823625377u,
3175888439u,
1759344347u, 2640637095u, 3549558u, 2192984935u,
978623493u, 804017880u, 3877562323u, 3843116489u,
1641748342u,
1853539444u,
3001178468u, 3443560727u, 2685426077u, 1653064722u,
349231508u, 2726789654u, 3136215581u, 768402830u,
269384321u,
531936536u,
2592883487u, 1343156334u, 3628619802u, 1477143570u,
4269458419u, 3285611028u, 959104925u, 2712290710u,
3480237248u,
835796333u,
2020636251u, 1191914589u, 126521603u, 4288023938u,
3731699932u, 2136758855u, 985780142u, 193807575u,
1850544433u,
653947619u,
3929316796u, 381871169u, 950486363u, 1787262279u,
360480382u, 1800636585u, 1039258631u, 3682073259u,
1262819303u,
1786000319u,
1570627191u, 893065837u, 301304916u, 1478469809u,
623018819u, 2742232545u, 2058913014u, 1706060059u,
2421125401u,
1315829592u,
3208766775u, 1805586156u, 575853086u, 3085025513u,
4010908260u, 2344058256u, 3814407434u, 1458485673u,
2474514786u,
3581895658u,
2710719679u, 190812706u, 2135454262u, 2620080728u,
3400757986u, 1669914857u, 1559978393u, 1629811331u,
3096616493u,
1391424435u,
4158376003u, 1015657076u, 794783832u, 479952178u,
1150290207u, 2497437906u, 231815090u, 755078067u,
3832053281u,
63649475u,
2415822606u, 4105027719u, 1706992318u, 1106598740u,
3941945667u, 1271300761u, 505882259u, 760186809u,
2657183368u,
1925422058u,
1039773764u, 880219458u, 4275949176u, 1556833823u,
925882132u, 4216310340u, 757497522u, 461833914u,
3884002070u,
2790957660u,
2100050089u, 651959176u, 1380301291u, 1289124125u,
452314403u, 226156280u, 3306924715u, 1750807758u,
2290180542u,
1953760569u,
2253069096u, 3960924806u, 1786291620u, 60736185u,
2569018293u, 3870479674u, 2247005661u, 2239850953u,
4261808536u,
3282975782u,
780945879u, 3349849383u, 1579362556u, 2265045884u,
905088740u, 725212379u, 3156479246u, 2501620391u,
3062836263u,
4070422690u,
996797869u, 4082582315u, 976105756u, 303983602u,
1862104804u, 3864508254u, 3383979677u, 2835500286u,
2798364010u,
519359476u,
3447342725u, 194373889u, 3313466630u, 232399983u,
2841787856u, 1672751454u, 3345183154u, 1805381384u,
2226129336u,
2847829057u,
2350774567u, 2838540121u, 2757948482u, 1017002062u,
2329150951u, 2171488196u, 3668619047u, 3874977844u,
3287966998u,
262346753u,
2493054715u, 2298644430u, 2926101182u, 1528457638u,
598656233u, 2615845874u, 989110727u, 820441411u,
253617372u,
2201077208u,
2047569338u, 3114356329u, 3335563734u, 2967673540u,
768438341u, 1417708203u, 3873718246u, 1538441843u,
1279167650u,
3917966776u,
2218481734u, 1015935150u, 1957845042u, 1318150213u,
3146423971u, 4218994877u, 1162470863u, 1519718292u,
2594658906u,
665870414u,
3430347817u, 3933868731u, 1597041394u, 3138684682u,
3398212027u, 1064647658u, 1576321132u, 14792918u,
224938029u,
3706456050u,
847274786u, 2645698692u, 1743374687u, 2343133224u,
3066596790u, 2857270120u, 200596308u, 452055528u,
2319312082u,
3488655402u,
4146865894u, 608206438u, 2699777051u, 3687240713u,
327957508u, 3664730153u, 568134564u, 2993484554u,
4159860363u,
4274533921u,
1079994063u, 2360220210u, 3609597760u, 3639708902u,
2836180437u, 1069910270u, 1892427666u, 1874729790u,
1267712826u,
121886940u,
3572289214u, 2475945610u, 783779452u, 588827737u,
1531395014u, 2085084212u, 2219189792u, 3981444548u,
2218885336u,
1691622694u,
2053232885u, 1386558530u, 2182946189u, 2365247285u,
1871081313u, 2935751853u, 38413723u, 543465863u,
900691890u,
2899905665u,
575120562u, 93133904u, 457154948u, 2983705792u,
4232229200u, 2038565963u, 614693984u, 3405328302u,
4083090010u,
2088004171u,
244031209u, 1861889294u, 2417109253u, 3299562328u,
4158642443u, 4199064449u, 3161611046u, 885015950u,
3677904099u,
2969861785u,
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2157395621u, 850457360u, 2758902426u, 2848030169u,
6506379u, 1162213157u, 2981459221u, 272690871u,
3059420255u,
4242691285u,
588065598u, 1206949936u, 3968214184u, 566348532u,
126142880u, 1480567086u, 2959621988u, 2050218418u,
2242731195u,
3833514449u,
1898070331u, 3687399477u, 3891859374u, 868185955u,
2335308774u, 3676335246u, 3871121805u, 2189032743u,
3275728647u,
860492892u,
1590764344u, 4130384758u, 262871548u, 3004764525u,
2685542071u, 991231482u, 435122019u, 3031116998u,
2898921700u,
2917932604u,
4238665148u, 2459072654u, 3444612545u, 4207731740u,
1808564313u, 2798532269u, 3944553556u, 3926395409u,
1633200670u,
4138335224u,
2524878605u, 4184292650u, 3563398268u, 4288943552u,
3802121210u, 957502058u, 2410820887u, 4227117506u,
4018625153u,
4284329158u,
530216712u, 2978986531u, 863452221u, 1910162118u,
4088211378u, 4091971261u, 3150811451u, 4200871487u,
3794038652u,
3041564310u,
2045287082u, 887805614u, 2889167251u, 4120352181u,
1699912580u, 3478922097u, 3211994687u, 3136177842u,
1500806861u,
3211881347u,
2147976385u, 3342722260u, 3359650541u, 4197378460u,
781354073u, 1533623029u, 2204677828u, 3228172832u,
3248592437u,
3355841359u,
560815159u, 1144951236u, 4027015711u, 2882625391u,
339363613u, 2354572719u, 1769831876u, 4238589331u,
1519732871u,
2185834614u,
1601096831u, 129709881u, 39655633u, 367604993u,
1737681770u, 3259114599u, 2767070452u, 872365177u,
1574125529u,
3405020189u,
4181346685u, 1134030380u, 403769171u, 2193351164u,
1426232618u, 2885309450u, 3033612627u, 924948363u,
935514094u,
3202053329u,
912294839u, 1618472324u, 4159158431u, 3744999487u,
777064358u, 3974213124u, 1990246048u, 309725290u,
2449849392u,
1943692420u,
2288635750u, 2433793635u, 2168904061u, 683315308u,
3081493019u, 3477759434u, 3815496269u, 2823504699u,
586945121u,
3088963200u,
3492287335u, 636875049u, 1111206944u, 2037346120u,
1282050044u, 1409681512u, 1786128584u, 755810950u,
2332676758u,
2178142310u,
957827166u, 1014983590u, 1888800725u, 3608595803u,
3200072714u, 2534008478u, 659336139u, 1281728287u,
4060560529u,
2915575125u,
3521503774u, 2926487340u, 1096297674u, 653489861u,
2352326980u, 2561136777u, 1224141198u, 1250479629u,
1297625391u,
2409997371u,
1942483722u, 2481835750u, 1394715707u, 1673070941u,
2456039704u, 3980558014u, 3547934764u, 1882038812u,
1078160498u,
2488279087u,
1848235245u, 1211914722u, 2264928765u, 2807773070u,
270145554u, 583747883u, 3826009010u, 2996618216u,
425727157u,
992726957u,
3384462280u, 726650661u, 1955043265u, 1923879512u,
1854693773u, 2987614542u, 2660044993u, 2457260810u,
426299370u,
2671892900u,
1827308087u, 3083953443u, 1791749638u, 3265087416u,
2119752201u, 2547122538u, 3990783236u, 1912713468u,
3688865211u,
1815780016u,
303699291u, 2416763742u, 2690891610u, 1535193548u,
1107803989u, 1504143133u, 2235270371u, 2545884083u,
2276278682u,
411724404u,
3416925704u, 2565792091u, 3383911757u, 546058824u,
3374654444u, 2364630415u, 2693473470u, 2622125691u,
261864817u,
55682470u,
857617568u, 141304067u, 1885488541u, 155368182u,
1281949051u, 3384522408u, 3254816901u, 1959816782u,
1452224057u,
2830267691u,
3709231247u, 58988202u, 4218130458u, 2984061349u,
1888707848u, 4223605071u, 4241442486u, 375269213u,
3208327038u,
2199916493u,
550337252u, 2855061437u, 276088636u, 114362204u,
2321163647u, 2127813633u, 3289403024u, 2686973202u,
2717376797u,
3593428039u,
3648831666u, 890925902u, 3289404818u, 3289516821u,
4248913260u, 1858916580u, 3303932308u, 1752797086u,
1628149686u,
3245893605u,
1568537311u, 2844194502u, 1593855770u, 2408174109u,
124797514u, 2085649512u, 3188565660u, 2264996276u,
1926696513u,
3053957740u,
2238806881u, 2189050973u, 203685243u, 379855590u,
3920271562u, 1058600179u, 3698061923u, 4255106849u,
608401664u,
1598041932u,
3318266418u, 2535016555u, 852760884u, 1918098822u,
2200437599u, 1532285043u, 3425662132u, 3561293706u,
2231633206u,
4108785088u,
3359152801u, 173534780u, 208383607u, 2862988169u,
2406642243u, 426814583u, 2777335795u, 3322703596u,
954190623u,
615093090u,
4179102978u, 2452847930u, 100239619u, 42471741u,
818352432u, 2190624654u, 504379960u, 3631619975u,
633412456u,
1018421783u,
842645419u, 711808707u, 3424580813u, 2132457941u,
1158335882u, 3567952480u, 2302183699u, 1145788151u,
3474264138u,
3105085243u,
3115506027u, 2783713015u, 3871785309u, 539583269u,
1400252405u, 3857849984u, 4231186588u, 1278653799u,
1760227022u,
761044088u,
3838185417u, 2439542532u, 585283357u, 2055995220u,
937117124u, 3831944855u, 1823586038u, 3287917855u,
485082427u,
3209172809u,
1984570176u, 2818337297u, 2691869057u, 3790476953u,
839035557u, 3203129010u, 669981176u, 4121157385u,
3519870450u,
3792633352u,
3017650322u, 1603459507u, 4225677666u, 376555451u,
473780127u, 2018786277u, 3299822439u, 1010254499u,
2383887565u,
3155009499u,
3108110655u, 2641738274u, 3684908622u, 1606463047u,
3311068174u, 52708046u, 754181455u, 1018079176u,
3915670272u,
3366999425u,
1012880204u, 1339439715u, 466437962u, 1402662350u,
2504046911u, 736323938u, 2037800124u, 1725908589u,
716341840u,
1750123474u,
3366342464u, 1743666195u, 2975303189u, 3821364027u,
3253707772u, 3635548377u, 3840413796u, 1955642085u,
1018315169u,
1258092848u,
2095540656u, 1076256607u, 117289557u, 1311658655u,
2118301000u, 68721550u, 2886814107u, 2712432819u,
4201862886u,
753807148u,
1940229047u, 731347296u, 1068901393u, 3873155894u,
2852787666u, 1973464853u, 79735652u, 3966380587u,
3245740712u,
2525773438u,
734938109u, 3045656416u, 3335746354u, 4099732691u,
1911896517u, 1697006473u, 1145487066u, 1605663299u,
3053606724u,
2386289465u,
3821211369u, 1006215345u, 1256304829u, 1053001668u,
1289194958u, 118761054u, 1853688730u, 2803418011u,
188650809u,
3763686458u,
1006829556u, 2961984133u, 3390525025u, 2061199893u,
141792681u, 2439893463u, 2652982650u, 1804942682u,
1546510005u,
1246961405u,
2407577046u, 565772575u, 3751844810u, 2943166103u,
3750052451u, 3022527280u, 25162928u, 397381043u,
1818337632u,
3447363730u,
3936437150u, 2569420703u, 2215592390u, 2171555672u,
3665571006u, 4021712412u, 2939158353u, 4057813172u,
1823237318u,
103999245u,
3251978010u, 3591914940u, 3582495283u, 2519035265u,
3905726135u, 3180393349u, 2743117123u, 55247368u,
3325286701u,
705195946u,
1857526853u, 1480518550u, 3809990433u, 1398189338u,
3126362926u, 3959531492u, 1503658285u, 1977847740u,
3043964489u,
2613086143u,
1518119282u, 4238434900u, 3905746486u, 3064949667u,
1028122931u, 3309119457u, 4071194920u, 3096098907u,
4137180520u,
494467959u,
1231408687u, 1691606157u, 1793452569u, 2722196118u,
3478603952u, 1059665738u, 2282032278u, 3990268388u,
1719514651u,
4248311578u,
3799146721u, 898026304u, 3367808954u, 4162472815u,
170495870u, 1308116609u, 3428285344u, 1714716475u,
395576794u,
4153638621u,
2999745812u, 3483315953u, 304980828u, 595337120u,
3486516729u, 2331563143u, 2583609459u, 1885928417u,
3834283777u,
979337825u,
932057378u, 3124081189u, 1930356777u, 3865887996u,
4178282217u, 4214219408u, 3669465884u, 1472413856u,
3356866587u,
1012769806u,
3043639963u, 996996396u, 207308216u, 982967331u,
2991319933u, 318066902u, 721489670u, 1249967713u,
749240921u,
591392325u,
2379365192u, 2250868849u, 2163259329u, 143191325u,
3778285606u, 982149096u, 3536906200u, 2244353244u,
1443862317u,
3161549210u,
2183127464u, 2015409516u, 547003700u, 2032484282u,
523677821u, 4275663308u, 3827205526u, 3903778273u,
2444530525u,
2543645801u,
1173958423u, 784740616u, 2878693675u, 3127696736u,
3832037316u, 3161002398u, 4084166400u, 4213346853u,
223390424u,
4273380883u,
2130315482u, 3429606032u, 3367732613u, 1912357694u,
422632590u, 1266957023u, 3437535648u, 736404240u,
2281709372u,
415859912u,
212948797u, 351612650u, 3920561440u, 112963586u,
2230727543u, 2851076612u, 1990662634u, 2264296857u,
3131463650u,
2704034623u,
3541637839u, 2954232792u, 533986918u, 4158757533u,
65174248u, 4232639593u, 865906667u, 1948225652u,
779656112u,
3873989249u,
2372984749u, 2346988193u, 1104345713u, 1165654138u,
4045762610u, 3588205178u, 461363991u, 1111215752u,
1389675192u,
2404325151u,
2152228101u, 3808973622u, 1901235912u, 3458690696u,
314513238u, 2539459143u, 2847998873u, 952026138u,
2325705328u,
407844712u,
3727960715u, 2996448351u, 2374336760u, 3138756390u,
2600015243u, 539980418u, 1876285352u, 1670330799u,
1709360377u,
2868531654u,
494777964u, 2773053597u, 599486162u, 3962209577u,
1871328846u, 2171933018u, 110279472u, 384074780u,
4147021936u,
2333589647u,
4251778066u, 40493468u, 3099342316u, 4108779767u,
2812424588u, 954542332u, 2040682331u, 2251152306u,
45915516u,
259525626u,
1045384743u, 4134656562u, 749389261u, 874399445u,
616549904u, 2200447504u, 436024539u, 78972290u,
3210485762u,
1907985531u,
3013721395u, 4214533685u, 4198804243u, 534879265u,
1517190881u, 3756787754u, 1152563554u, 1718750948u,
777737463u,
1402478860u,
1824562784u, 1879401449u, 3515818786u, 513165201u,
1423491227u, 2103067918u, 2291777410u, 1097943000u,
};

// Return false only if offset is -1 and a spot check of 3 hashes all yield 0.
bool Test(int offset, int len = 0) {
#undef Check
#undef IsAlive

#define Check(x) do {                           \
  bool ok = expected[index++] == (x);           \
  assert(ok);                                   \
  errors += !ok;                                \
} while (0)

#define IsAlive(x) do { alive += IsNonZero(x); } while (0)

  // After the following line is where the uses of "Check" and such will go.
  static int index = 0;
if (offset == -1) { int alive = 0; IsAlive(farmhashcc::Hash32WithSeed(data, len++, SEED)); IsAlive(farmhashcc::Hash32(data, len++)); { uint128_t u = farmhashcc::Fingerprint128(data, len++); uint64_t h = Uint128Low64(u); IsAlive(h >> 32); IsAlive((h << 32) >> 32); h = Uint128High64(u); IsAlive(h >> 32); IsAlive((h << 32) >> 32); } len -= 3; return alive > 0; }
Check(farmhashcc::Hash32WithSeed(data + offset, len, SEED));
Check(farmhashcc::Hash32(data + offset, len));
{ uint128_t u = farmhashcc::Fingerprint128(data + offset, len); uint64_t h = Uint128Low64(u); Check(h >> 32); Check((h << 32) >> 32); h = Uint128High64(u); Check(h >> 32); Check((h << 32) >> 32); }
{ uint128_t u = farmhashcc::CityHash128WithSeed(data + offset, len, Uint128(SEED0, SEED1)); uint64_t h = Uint128Low64(u); Check(h >> 32); Check((h << 32) >> 32); h = Uint128High64(u); Check(h >> 32); Check((h << 32) >> 32); }

  return true;
#undef Check
#undef IsAlive
}

int RunTest() {
  Setup();
  int i = 0;
  cout << "Running farmhashccTest";
  if (!Test(-1)) {
    cout << "... Unavailable\n";
    return NoteErrors();
  }
  // Good.  The function is attempting to hash, so run the full test.
  int errors_prior_to_test = errors;
  for ( ; i < kTestSize - 1; i++) {
    Test(i * i, i);
  }
  for ( ; i < kDataSize; i += i / 7) {
    Test(0, i);
  }
  Test(0, kDataSize);
  cout << (errors == errors_prior_to_test ? "... OK\n" : "... Failed\n");
  return NoteErrors();
}

#else

// After the following line is where the code to print hash codes will go.
void Dump(int offset, int len) {
cout << farmhashcc::Hash32WithSeed(data + offset, len, SEED) << "u," << endl;
cout << farmhashcc::Hash32(data + offset, len) << "u," << endl;
{ uint128_t u = farmhashcc::Fingerprint128(data + offset, len); uint64_t h = Uint128Low64(u); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u, "; h = Uint128High64(u); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
{ uint128_t u = farmhashcc::CityHash128WithSeed(data + offset, len, Uint128(SEED0, SEED1)); uint64_t h = Uint128Low64(u); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u, "; h = Uint128High64(u); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
}

#endif

#undef SEED
#undef SEED1
#undef SEED0

}  // namespace farmhashccTest

#if TESTING

static int farmhashccTestResult = farmhashccTest::RunTest();

#else
int main(int argc, char** argv) {
  Setup();
  cout << "uint32_t expected[] = {\n";
  int i = 0;
  for ( ; i < kTestSize - 1; i++) {
    farmhashccTest::Dump(i * i, i);
  }
  for ( ; i < kDataSize; i += i / 7) {
    farmhashccTest::Dump(0, i);
  }
  farmhashccTest::Dump(0, kDataSize);
  cout << "};\n";
}
#endif
#ifndef FARMHASH_SELF_TEST_GUARD
#define FARMHASH_SELF_TEST_GUARD
#include <string.h>
#include <cstdio>
#include <iostream>

using std::cout;
using std::cerr;
using std::endl;
using std::hex;

static const uint64_t kSeed0 = 1234567;
static const uint64_t kSeed1 = k0;
static const int kDataSize = 1 << 20;
static const int kTestSize = 300;
#define kSeed128 Uint128(kSeed0, kSeed1)

static char data[kDataSize];

static int completed_self_tests = 0;
static int errors = 0;

// Initialize data to pseudorandom values.
void Setup() {
  if (completed_self_tests == 0) {
    uint64_t a = 9;
    uint64_t b = 777;
    for (int i = 0; i < kDataSize; i++) {
      a += b;
      b += a;
      a = (a ^ (a >> 41)) * k0;
      b = (b ^ (b >> 41)) * k0 + i;
      uint8_t u = b >> 37;
      memcpy(data + i, &u, 1);  // uint8_t -> char
    }
  }
}

int NoteErrors() {
#define NUM_SELF_TESTS 6
  if (++completed_self_tests == NUM_SELF_TESTS)
    std::exit(errors > 0);
  return errors;
}

template <typename T> inline bool IsNonZero(T x) {
  return x != 0;
}

template <> inline bool IsNonZero<uint128_t>(uint128_t x) {
  return x != Uint128(0, 0);
}

#endif  // FARMHASH_SELF_TEST_GUARD

namespace farmhashmkTest {

uint32_t CreateSeed(int offset, int salt) {
  uint32_t h = static_cast<uint32_t>(salt & 0xffffffff);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h += static_cast<uint32_t>(offset & 0xffffffff);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  return h;
}

#undef SEED
#undef SEED1
#undef SEED0
#define SEED CreateSeed(offset, -1)
#define SEED0 CreateSeed(offset, 0)
#define SEED1 CreateSeed(offset, 1)

#undef TESTING
#define TESTING 1
#if TESTING
uint32_t expected[] = {
4223616069u,
3696677242u,
4081014168u,
2576519988u,
2212771159u,
1112731063u,
1020067935u,
3955445564u,
1451961420u,
653440099u,
31917516u,
2957164615u,
2590087362u,
3879448744u,
176305566u,
2447367541u,
1359016305u,
3363804638u,
1117290165u,
1062549743u,
2437877004u,
1894455839u,
673206794u,
3486923651u,
3269862919u,
2303349487u,
1380660650u,
595525107u,
1525325287u,
2025609358u,
176408838u,
1592885012u,
864896482u,
2101378090u,
3489229104u,
2118965695u,
581644891u,
2718789079u,
631613207u,
4228658372u,
3867875546u,
3531368319u,
3804516756u,
3317755099u,
1619744564u,
2884717286u,
1088213445u,
2667691076u,
3727873235u,
2330406762u,
3616470388u,
967660719u,
4148162586u,
315219121u,
673084328u,
3047602355u,
1598963653u,
1267826661u,
2117362589u,
2861192253u,
1823625377u,
1380350078u,
1641748342u,
1176094482u,
269384321u,
2178982315u,
3480237248u,
2660755208u,
1850544433u,
3429699438u,
1262819303u,
640556464u,
2421125401u,
2188368608u,
2612932825u,
1474432581u,
173790449u,
2124882189u,
831272654u,
622960146u,
4238751051u,
3250317967u,
2120810248u,
1948231495u,
1389029321u,
2200398357u,
2134232963u,
2948072329u,
617717625u,
681164587u,
114859387u,
430545646u,
57239089u,
3163338012u,
3482496399u,
557662576u,
1102441413u,
2670159360u,
991116729u,
846014240u,
4233741566u,
1802317242u,
3129528802u,
1459456375u,
1305643039u,
3258671612u,
1578285833u,
868590079u,
1631034517u,
1695432937u,
561078856u,
1004115553u,
3086090507u,
3818348650u,
731596645u,
780926790u,
2544205955u,
158479164u,
3983514188u,
2004735250u,
3436218400u,
673684751u,
1463431419u,
2880490219u,
3223748024u,
2218318859u,
1474466194u,
2636437533u,
2206794961u,
140995728u,
1186394086u,
1805716888u,
1640037724u,
3942729099u,
1944727013u,
918951560u,
498666871u,
3486974657u,
2967205462u,
1167253804u,
1884281041u,
2866015002u,
4158319270u,
2627220079u,
3733319624u,
3317092271u,
438323662u,
3195868065u,
3426606709u,
360708338u,
1905491012u,
650004803u,
1351266252u,
3133279000u,
3722811115u,
2722412434u,
918432408u,
3678271248u,
269599647u,
621514057u,
3117077855u,
1545425390u,
2597567410u,
1221437820u,
3493254589u,
102787342u,
918861168u,
348795089u,
3439883229u,
2353641807u,
2209585469u,
4035884492u,
2686995435u,
1649888022u,
3852893848u,
3042700028u,
314103172u,
726977769u,
2489830276u,
2872753660u,
1316214989u,
1488801501u,
1811420390u,
639581627u,
2362837215u,
3634581834u,
3648576802u,
1257314182u,
762118371u,
4268447045u,
730167096u,
755561509u,
882614845u,
3696972894u,
228263661u,
1478636142u,
2767751651u,
1532617116u,
3838657661u,
1944359935u,
1401102137u,
3772933173u,
1050098254u,
1658079354u,
1846025728u,
2204244794u,
2017217424u,
1275162853u,
1429816745u,
2175565479u,
1716109139u,
1187506761u,
2434641075u,
2725597783u,
1795687662u,
1393312782u,
3511565397u,
627885430u,
4145733164u,
2519005353u,
231414775u,
1242015635u,
2760723497u,
2185540568u,
727314436u,
2358790354u,
1186393454u,
4234795645u,
350567813u,
866773875u,
3145590392u,
1158374055u,
3903123687u,
1862119793u,
2204587556u,
4266276976u,
4151548555u,
915250402u,
2874695320u,
2360311410u,
1099212769u,
1271542714u,
3473148363u,
1637325418u,
1807795989u,
2493819794u,
3800917924u,
4001205856u,
2582153621u,
3365872040u,
2890146216u,
2626363824u,
3133351295u,
4046827296u,
3053118771u,
4113026751u,
884356716u,
3828347401u,
10608262u,
830987972u,
1841080500u,
3202717763u,
3561778749u,
1906000052u,
3058284660u,
1432904514u,
2567431677u,
2550162530u,
665557986u,
936887821u,
2101205308u,
4253535847u,
1662043545u,
1253611611u,
2091370094u,
2635077370u,
2602176041u,
3624115809u,
748442714u,
2709749154u,
1023493343u,
860291012u,
3924715584u,
1536436740u,
2551145800u,
2391782865u,
1467705048u,
2583909796u,
3616666170u,
1162857372u,
4228631071u,
1510132376u,
2739165009u,
2656606142u,
3454996358u,
3155038853u,
1022087316u,
100044110u,
494208296u,
2746186477u,
4216782431u,
225448834u,
3728320521u,
335282866u,
3148194874u,
953503703u,
1293353960u,
202372387u,
1326119870u,
4045123735u,
3819994846u,
1629004186u,
1081099186u,
3591584153u,
1670825804u,
3404257979u,
3262192301u,
2572846095u,
3714992543u,
4264142572u,
529616678u,
2882154574u,
3006354178u,
3865969421u,
2007174907u,
308283107u,
2629833703u,
3159124075u,
1146492131u,
494104332u,
493149727u,
1342910585u,
521642387u,
2201695937u,
2517980959u,
2426821287u,
777374655u,
2228189792u,
4027055486u,
228976000u,
3842083468u,
1723920223u,
1192126094u,
787744493u,
2740368380u,
2284153001u,
2773829458u,
442000614u,
387830783u,
2169780670u,
2253144627u,
3532502484u,
1969684059u,
1165351416u,
3055056536u,
3582324253u,
231419363u,
770979865u,
3213983597u,
3690452836u,
935794639u,
3230602762u,
2841762457u,
407598927u,
1164479891u,
3721799696u,
354738136u,
1801566618u,
3206038542u,
2621379981u,
1943487262u,
3534745636u,
1074424589u,
1304517521u,
4133400969u,
2339317978u,
2135116860u,
4180643791u,
2415309340u,
1855926417u,
3418648630u,
1968113037u,
597304222u,
3668824865u,
3810008716u,
3014702569u,
3151212026u,
156057449u,
373134533u,
2068234004u,
191580563u,
3832754488u,
2924104199u,
2026044494u,
4065780435u,
122565840u,
4194985167u,
2744823717u,
2494098735u,
3753793370u,
1885739217u,
2488161225u,
3643797615u,
2653367310u,
2494061477u,
189968132u,
899646597u,
392100396u,
4012318310u,
3855777086u,
3566860954u,
2698574996u,
2414249905u,
1330623339u,
1263222732u,
1277741760u,
2194959402u,
1629656136u,
120494320u,
1072368005u,
1084245077u,
4011372748u,
1366613353u,
3108643228u,
3332219532u,
2114746095u,
3964007334u,
371687128u,
1084813876u,
126459896u,
4292782331u,
321283184u,
398168499u,
3604983506u,
560701543u,
2073961354u,
4240841868u,
4151211362u,
1338986875u,
4093476832u,
2269279497u,
3500846299u,
2510225147u,
598000444u,
1330391422u,
1432533385u,
4171226231u,
426821154u,
2932270996u,
3378981077u,
2217871549u,
1619647984u,
4051608043u,
3180237819u,
12919578u,
1375401767u,
371320427u,
2986640571u,
2336669859u,
3796464715u,
1892383284u,
306814912u,
2125823211u,
1863678891u,
3249703818u,
3840225752u,
281579900u,
264680257u,
4266359110u,
4182229890u,
2239659703u,
3627947372u,
2373929191u,
224082765u,
4053639058u,
1862360303u,
3187739624u,
3392706679u,
948039509u,
817505760u,
1215842393u,
3462222651u,
536021853u,
182346832u,
2731944883u,
2346674384u,
2640961678u,
3446695687u,
2271722179u,
1301069656u,
2803881468u,
2832614405u,
1691544398u,
698756814u,
3980620906u,
3565421410u,
754769376u,
4115923404u,
3909962218u,
2747614077u,
2888289845u,
1016920862u,
2790946178u,
3067070960u,
3173251481u,
1572132982u,
255048203u,
2996538818u,
3405398987u,
136106013u,
3581605228u,
4277437977u,
2147300534u,
3728426265u,
3483629996u,
1478452694u,
20756076u,
2774992067u,
432987927u,
1516771026u,
3511588664u,
2130994978u,
509385406u,
873090347u,
2163904107u,
4192239086u,
2532489989u,
1090772651u,
3910797408u,
3710882132u,
155010959u,
1369823531u,
1599664937u,
4035593587u,
1212746925u,
795822552u,
116689518u,
3674240941u,
1135576664u,
756750261u,
1027431362u,
390555140u,
2228460216u,
1506940482u,
3733857700u,
3048762971u,
2511703196u,
548609887u,
1607354252u,
659053982u,
259884450u,
1793130460u,
4083364495u,
3148555881u,
1764350138u,
2436485683u,
4031563025u,
3261860724u,
2475833430u,
2101726086u,
3191176464u,
2646658847u,
2127042126u,
771316100u,
2115922959u,
3208515045u,
2355437783u,
3621147793u,
1580163615u,
3211555675u,
3299188490u,
191613920u,
466733956u,
2939029038u,
1509152039u,
130591314u,
1892874677u,
1646908044u,
3452406523u,
3998376606u,
1199243832u,
2187108812u,
3189230066u,
4161151481u,
3371454980u,
3681788646u,
180842187u,
3685022399u,
3058749895u,
3250165163u,
2895367943u,
2627101723u,
771755098u,
1332921024u,
3638871848u,
514215135u,
3591227378u,
2300310870u,
3689533503u,
851607114u,
114330368u,
2709027386u,
1743034877u,
1013693860u,
288169008u,
3545190686u,
1052165084u,
3995862307u,
96902755u,
1097819851u,
2645431442u,
2184148618u,
2151206566u,
350979797u,
3467920900u,
421116779u,
1246252u,
4057835428u,
329324407u,
4104482417u,
844624570u,
3306265806u,
3787625025u,
4263241191u,
3251413927u,
2921204431u,
2931915325u,
992134330u,
3986338354u,
1327895216u,
1458363596u,
1480608532u,
728594368u,
3804366693u,
794404223u,
1643240863u,
793417255u,
4167916443u,
2683488959u,
3124925324u,
4184843652u,
3750971752u,
308509829u,
1054550805u,
2797511972u,
4043123412u,
1587158240u,
4050518606u,
3030062190u,
2589912753u,
603440067u,
937013191u,
1071662315u,
2100661456u,
2602005741u,
435516078u,
2260470147u,
1256268350u,
3612035u,
3368856141u,
151516099u,
3081868591u,
3363755681u,
2049963149u,
2885320434u,
84682005u,
2411758308u,
2695174275u,
3099904644u,
1787308684u,
1132379308u,
564634346u,
510236510u,
2804443681u,
3931864252u,
2064427949u,
1893979229u,
2916544974u,
1885887717u,
2978018250u,
494192125u,
2642662373u,
901112508u,
636035003u,
1658643797u,
172746975u,
517504890u,
3440019372u,
4144498044u,
1854755456u,
3672653905u,
4176892856u,
382159097u,
282871690u,
3629300472u,
2500754041u,
1677659759u,
1067175061u,
161654075u,
1672575536u,
346120493u,
2730229631u,
203466442u,
1244549529u,
199761971u,
2744895408u,
3195315331u,
2124618519u,
3261045496u,
985339699u,
3385585455u,
1545740710u,
3636652160u,
2167020081u,
1207897204u,
28752417u,
2895834146u,
3640845375u,
3750293073u,
548997850u,
4207814196u,
4183030708u,
2462810989u,
3929965401u,
};

// Return false only if offset is -1 and a spot check of 3 hashes all yield 0.
bool Test(int offset, int len = 0) {
#undef Check
#undef IsAlive

#define Check(x) do {                           \
  bool ok = expected[index++] == (x);           \
  assert(ok);                                   \
  errors += !ok;                                \
} while (0)

#define IsAlive(x) do { alive += IsNonZero(x); } while (0)

  // After the following line is where the uses of "Check" and such will go.
  static int index = 0;
if (offset == -1) { int alive = 0; IsAlive(farmhashmk::Hash32WithSeed(data, len++, SEED)); IsAlive(farmhashmk::Hash32(data, len++)); IsAlive(farmhashmk::Hash32(data, len++)); len -= 3; return alive > 0; }
Check(farmhashmk::Hash32WithSeed(data + offset, len, SEED));
Check(farmhashmk::Hash32(data + offset, len));

  return true;
#undef Check
#undef IsAlive
}

int RunTest() {
  Setup();
  int i = 0;
  cout << "Running farmhashmkTest";
  if (!Test(-1)) {
    cout << "... Unavailable\n";
    return NoteErrors();
  }
  // Good.  The function is attempting to hash, so run the full test.
  int errors_prior_to_test = errors;
  for ( ; i < kTestSize - 1; i++) {
    Test(i * i, i);
  }
  for ( ; i < kDataSize; i += i / 7) {
    Test(0, i);
  }
  Test(0, kDataSize);
  cout << (errors == errors_prior_to_test ? "... OK\n" : "... Failed\n");
  return NoteErrors();
}

#else

// After the following line is where the code to print hash codes will go.
void Dump(int offset, int len) {
cout << farmhashmk::Hash32WithSeed(data + offset, len, SEED) << "u," << endl;
cout << farmhashmk::Hash32(data + offset, len) << "u," << endl;
}

#endif

#undef SEED
#undef SEED1
#undef SEED0

}  // namespace farmhashmkTest

#if TESTING

static int farmhashmkTestResult = farmhashmkTest::RunTest();

#else
int main(int argc, char** argv) {
  Setup();
  cout << "uint32_t expected[] = {\n";
  int i = 0;
  for ( ; i < kTestSize - 1; i++) {
    farmhashmkTest::Dump(i * i, i);
  }
  for ( ; i < kDataSize; i += i / 7) {
    farmhashmkTest::Dump(0, i);
  }
  farmhashmkTest::Dump(0, kDataSize);
  cout << "};\n";
}
#endif
#ifndef FARMHASH_SELF_TEST_GUARD
#define FARMHASH_SELF_TEST_GUARD
#include <string.h>
#include <cstdio>
#include <iostream>

using std::cout;
using std::cerr;
using std::endl;
using std::hex;

static const uint64_t kSeed0 = 1234567;
static const uint64_t kSeed1 = k0;
static const int kDataSize = 1 << 20;
static const int kTestSize = 300;
#define kSeed128 Uint128(kSeed0, kSeed1)

static char data[kDataSize];

static int completed_self_tests = 0;
static int errors = 0;

// Initialize data to pseudorandom values.
void Setup() {
  if (completed_self_tests == 0) {
    uint64_t a = 9;
    uint64_t b = 777;
    for (int i = 0; i < kDataSize; i++) {
      a += b;
      b += a;
      a = (a ^ (a >> 41)) * k0;
      b = (b ^ (b >> 41)) * k0 + i;
      uint8_t u = b >> 37;
      memcpy(data + i, &u, 1);  // uint8_t -> char
    }
  }
}

int NoteErrors() {
#define NUM_SELF_TESTS 6
  if (++completed_self_tests == NUM_SELF_TESTS)
    std::exit(errors > 0);
  return errors;
}

template <typename T> inline bool IsNonZero(T x) {
  return x != 0;
}

template <> inline bool IsNonZero<uint128_t>(uint128_t x) {
  return x != Uint128(0, 0);
}

#endif  // FARMHASH_SELF_TEST_GUARD

namespace farmhashnaTest {

uint32_t CreateSeed(int offset, int salt) {
  uint32_t h = static_cast<uint32_t>(salt & 0xffffffff);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h += static_cast<uint32_t>(offset & 0xffffffff);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  return h;
}

#undef SEED
#undef SEED1
#undef SEED0
#define SEED CreateSeed(offset, -1)
#define SEED0 CreateSeed(offset, 0)
#define SEED1 CreateSeed(offset, 1)

#undef TESTING
#define TESTING 1
#if TESTING
uint32_t expected[] = {
1140953930u, 861465670u,
3277735313u, 2681724312u,
2598464059u, 797982799u,
890626835u, 800175912u,
2603993599u, 921001710u,
1410420968u, 2134990486u,
3283896453u, 1867689945u,
2914424215u, 2244477846u,
255297188u, 2992121793u,
1110588164u, 4186314283u,
161451183u, 3943596029u,
4019337850u, 452431531u,
283198166u, 2741341286u,
3379021470u, 2557197665u,
299850021u, 2532580744u,
452473466u, 1706958772u,
1298374911u, 3099673830u,
2199864459u, 3696623795u,
236935126u, 2976578695u,
4055299123u, 3281581178u,
1053458494u, 1882212500u,
2305012065u, 2169731866u,
3456121707u, 275903667u,
458884671u, 3033004529u,
3058973506u, 2379411653u,
1898235244u, 1402319660u,
2700149065u, 2699376854u,
147814787u, 720739346u,
2433714046u, 4222949502u,
4220361840u, 1712034059u,
3425469811u, 3690733394u,
4148372108u, 1330324210u,
594028478u, 2921867846u,
1635026870u, 192883107u,
780716741u, 1728752234u,
3280331829u, 326029180u,
3969463346u, 1436364519u,
393215742u, 3349570000u,
3824583307u, 1612122221u,
2859809759u, 3808705738u,
1379537552u, 1646032583u,
2233466664u, 1432476832u,
4023053163u, 2650381482u,
2052294713u, 3552092450u,
1628777059u, 1499109081u,
3476440786u, 3829307897u,
2960536756u, 1554038301u,
1145519619u, 3190844552u,
2902102606u, 3600725550u,
237495366u, 540224401u,
65721842u, 489963606u,
1448662590u, 397635823u,
1596489240u, 1562872448u,
1790705123u, 2128624475u,
180854224u, 2604346966u,
1435705557u, 1262831810u,
155445229u, 1672724608u,
1669465176u, 1341975128u,
663607706u, 2077310004u,
3610042449u, 1911523866u,
1043692997u, 1454396064u,
2563776023u, 294527927u,
1099072299u, 1389770549u,
703505868u, 678706990u,
2952353448u, 2026137563u,
3603803785u, 629449419u,
1933894405u, 3043213226u,
226132789u, 2489287368u,
1552847036u, 645684964u,
3828089804u, 3632594520u,
187883449u, 230403464u,
3151491850u, 3272648435u,
3729087873u, 1303930448u,
2002861219u, 165370827u,
916494250u, 1230085527u,
3103338579u, 3064290191u,
3807265751u, 3628174014u,
231181488u, 851743255u,
2295806711u, 1781190011u,
2988893883u, 1554380634u,
1142264800u, 3667013118u,
1968445277u, 315203929u,
2638023604u, 2290487377u,
732137533u, 1909203251u,
440398219u, 1891630171u,
1380301172u, 1498556724u,
4072067757u, 4165088768u,
4204318635u, 441430649u,
3931792696u, 197618179u,
956300927u, 914413116u,
3010839769u, 2837339569u,
2148126371u, 1913303225u,
3074915312u, 3117299654u,
4139181436u, 2993479124u,
3178848746u, 1357272220u,
1438494951u, 507436733u,
667183474u, 2084369203u,
3854939912u, 1413396341u,
126024219u, 146044391u,
1016656857u, 3022024459u,
3254014218u, 429095991u,
165589978u, 1578546616u,
985653208u, 1718653828u,
623071693u, 366414107u,
249776086u, 1207522198u,
3047342438u, 2991127487u,
3120876698u, 1684583131u,
46987739u, 1157614300u,
863214540u, 1087193030u,
199124911u, 520792961u,
3614377032u, 586863115u,
3331828431u, 1013201099u,
1716848157u, 4033596884u,
1164298657u, 4140791139u,
1146169032u, 1434258493u,
3824360466u, 3242407770u,
3725511003u, 232064808u,
872586426u, 762243036u,
2736953692u, 816692935u,
512845449u, 3748861010u,
2266795890u, 3781899767u,
4290630595u, 517646945u,
22638523u, 648000590u,
959214578u, 558910384u,
1283799121u, 3047062993u,
1024246061u, 4027776454u,
3544509313u, 622325861u,
834785312u, 382936554u,
411505255u, 1973395102u,
1825135056u, 2725923798u,
580988377u, 2826990641u,
3474970689u, 1029055034u,
812546227u, 2506885666u,
2584372201u, 1758123094u,
589567754u, 325737734u,
345313518u, 2022370576u,
3886113119u, 3338548567u,
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601221482u, 3992583643u,
2794121515u, 1533934172u,
1706465470u, 4281971893u,
2557027816u, 900741486u,
227175484u, 550595824u,
690918144u, 2825943628u,
90375300u, 300318232u,
1985329734u, 1440763373u,
3670603707u, 2533900859u,
3253901179u, 542270815u,
3677388841u, 307706478u,
2570910669u, 3320103693u,
1273768482u, 1216399252u,
1652924805u, 1043647584u,
1120323676u, 639941430u,
325675502u, 3652676161u,
4241680335u, 1545838362u,
1991398008u, 4100211814u,
1097584090u, 3262252593u,
2254324292u, 1765019121u,
4060211241u, 2315856188u,
3704419305u, 411263051u,
238929055u, 3540688404u,
3094544537u, 3250435765u,
3460621305u, 1967599860u,
2016157366u, 847389916u,
1659615591u, 4020453639u,
901109753u, 2682611693u,
1661364280u, 177155177u,
3210561911u, 3802058181u,
797089608u, 3286110054u,
2110358240u, 1353279028u,
2479975820u, 471725410u,
2219863904u, 3623364733u,
3167128228u, 1052188336u,
3656587111u, 721788662u,
3061255808u, 1615375832u,
924941453u, 2547780700u,
3328169224u, 1310964134u,
2701956286u, 4145497671u,
1421461094u, 1221397398u,
1589183618u, 1492533854u,
449740816u, 2686506989u,
3035198924u, 1682886232u,
2529760244u, 3342031659u,
1235084019u, 2151665147u,
2315686577u, 3282027660u,
1140138691u, 2754346599u,
2091754612u, 1178454681u,
4226896579u, 2942520471u,
2122168506u, 3751680858u,
3213794286u, 2601416506u,
4142747914u, 3951404257u,
4243249649u, 748595836u,
4004834921u, 238887261u,
1927321047u, 2217148444u,
205977665u, 1885975275u,
186020771u, 2367569534u,
2941662631u, 2608559272u,
3342096731u, 741809437u,
1962659444u, 3539886328u,
3036596491u, 2282550094u,
2366462727u, 2748286642u,
2144472852u, 1390394371u,
1257385924u, 2205425874u,
2119055686u, 46865323u,
3597555910u, 3188438773u,
2372320753u, 3641116924u,
3116286108u, 2680722658u,
3371014971u, 2058751609u,
2966943726u, 2345078707u,
2330535244u, 4013841927u,
1169588594u, 857915866u,
1875260989u, 3175831309u,
3193475664u, 1955181430u,
923161569u, 4068653043u,
776445899u, 954196929u,
61509556u, 4248237857u,
3808667664u, 581227317u,
2893240187u, 4159497403u,
4212264930u, 3973886195u,
2077539039u, 851579036u,
2957587591u, 772351886u,
1173659554u, 946748363u,
2794103714u, 2094375930u,
4234750213u, 3671645488u,
2614250782u, 2620465358u,
3122317317u, 2365436865u,
3393973390u, 523513960u,
3645735309u, 2766686992u,
2023960931u, 2312244996u,
1875932218u, 3253711056u,
3622416881u, 3274929205u,
612094988u, 1555465129u,
2114270406u, 3553762793u,
1832633644u, 1087551556u,
3306195841u, 1702313921u,
3675066046u, 1735998785u,
1690923980u, 1482649756u,
1171351291u, 2043136409u,
1962596992u, 461214626u,
3278253346u, 1392428048u,
3744621107u, 1028502697u,
3991171462u, 1014064003u,
3642345425u, 3186995039u,
6114625u, 3359104346u,
414856965u, 2814387514u,
3583605071u, 2497896367u,
1024572712u, 1927582962u,
2892797583u, 845302635u,
328548052u, 1523379748u,
3392622118u, 1347167673u,
1012316581u, 37767602u,
2647726017u, 1070326065u,
2075035198u, 4202817168u,
2502924707u, 2612406822u,
2187115553u, 1180137213u,
701024148u, 1481965992u,
3223787553u, 2083541843u,
203230202u, 3876887380u,
1334816273u, 2870251538u,
2186205850u, 3985213979u,
333533378u, 806507642u,
1010064531u, 713520765u,
3084131515u, 2637421459u,
1703168933u, 1517562266u,
4089081247u, 3231042924u,
3079916123u, 3154574447u,
2253948262u, 1725190035u,
2452539325u, 1343734533u,
213706059u, 2519409656u,
108055211u, 2916327746u,
587001593u, 1917607088u,
4202913084u, 926304016u,
469255411u, 4042080256u,
3498936874u, 246692543u,
495780578u, 438717281u,
2259272650u, 4011324645u,
2836854664u, 2317249321u,
946828752u, 1280403658u,
1905648354u, 2034241661u,
774652981u, 1285694082u,
2200307766u, 2158671727u,
1135162148u, 232040752u,
397012087u, 1717527689u,
1720414106u, 918797022u,
2580119304u, 3568069742u,
2904461070u, 3893453420u,
973817938u, 667499332u,
3785870412u, 2088861715u,
1565179401u, 600903026u,
591806775u, 3512242245u,
997964515u, 2339605347u,
1134342772u, 3234226304u,
4084179455u, 302315791u,
2445626811u, 2590372496u,
345572299u, 2274770442u,
3600587867u, 3706939009u,
1430507980u, 2656330434u,
1079209397u, 2122849632u,
1423705223u, 3826321888u,
3683385276u, 1057038163u,
1242840526u, 3987000643u,
2398253089u, 1538190921u,
1295898647u, 3570196893u,
3065138774u, 3111336863u,
2524949549u, 4203895425u,
3025864372u, 968800353u,
1023721001u, 3763083325u,
526350786u, 635552097u,
2308118370u, 2166472723u,
2196937373u, 2643841788u,
3040011470u, 4010301879u,
2782379560u, 3474682856u,
4201389782u, 4223278891u,
1457302296u, 2251842132u,
1090062008u, 3188219189u,
292733931u, 1424229089u,
1590782640u, 1365212370u,
3975957073u, 3982969588u,
2927147928u, 1048291071u,
2766680094u, 884908196u,
35237839u, 2221180633u,
2490333812u, 4098360768u,
4029081103u, 3490831871u,
2392516272u, 3455379186u,
3948800722u, 335456628u,
2105117968u, 4181629008u,
1044201772u, 3335754111u,
540133451u, 3313113759u,
3786107905u, 2627207327u,
3540337875u, 3473113388u,
3430536378u, 2514123129u,
2124531276u, 3872633376u,
3272957388u, 3501994650u,
2418881542u, 487365389u,
3877672368u, 1512866656u,
3486531087u, 2102955203u,
1136054817u, 3004241477u,
1549075351u, 1302002008u,
3936430045u, 2258587644u,
4109233936u, 3679809321u,
3467083076u, 2484463221u,
1594979755u, 529218470u,
3527024461u, 1147434678u,
106799023u, 1823161970u,
1704656738u, 1675883700u,
3308746763u, 1875093248u,
1352868568u, 1898561846u,
2508994984u, 3177750780u,
4217929592u, 400784472u,
80090315u, 3564414786u,
3841585648u, 3379293868u,
160353261u, 2413172925u,
2378499279u, 673436726u,
1505702418u, 1330977363u,
1853298225u, 3201741245u,
2135714208u, 4069554166u,
3715612384u, 3692488887u,
3680311316u, 4274382900u,
914186796u, 2264886523u,
3869634032u, 1254199592u,
1131020455u, 194781179u,
429923922u, 2763792336u,
2052895198u, 3997373194u,
3440090658u, 2165746386u,
1575500242u, 3463310191u,
2064974716u, 3779513671u,
3106421434u, 880320527u,
3281914119u, 286569042u,
3909096631u, 122359727u,
1429837716u, 252230074u,
4111461225u, 762273136u,
93658514u, 2766407143u,
3623657004u, 3869801679u,
3925695921u, 2390397316u,
2499025338u, 2741806539u,
2507199021u, 1659221866u,
361292116u, 4048761557u,
3797133396u, 1517903247u,
3121647246u, 3884308578u,
1697201500u, 1558800262u,
4150812360u, 3161302278u,
2610217849u, 641564641u,
183814518u, 2075245419u,
611996508u, 2223461433u,
329123979u, 121860586u,
860985829u, 1137889144u,
4018949439u, 2904348960u,
947795261u, 1992594155u,
4255427501u, 2281583851u,
2892637604u, 1478186924u,
3050771207u, 2767035539u,
373510582u, 1963520320u,
3763848370u, 3756817798u,
627269409u, 1806905031u,
1814444610u, 3646665053u,
1822693920u, 278515794u,
584050483u, 4142579188u,
2149745808u, 3193071606u,
1179706341u, 2693495182u,
3259749808u, 644172091u,
880509048u, 3340630542u,
3365160815u, 2384445068u,
3053081915u, 2840648309u,
1986990122u, 1084703471u,
2370410550u, 1627743573u,
2244943480u, 4057483496u,
2611595995u, 2470013639u,
4024732359u, 3987190386u,
873421687u, 2447660175u,
3226583022u, 767655877u,
2528024413u, 1962070688u,
1233635843u, 2163464207u,
659054446u, 854207134u,
258410943u, 4197831420u,
2515400215u, 3100476924u,
1961549594u, 2219491151u,
3997658851u, 163850514u,
470325051u, 2598261204u,
3052145580u, 59836528u,
1376188597u, 966733415u,
850667549u, 3622479237u,
1083731990u, 1525777459u,
4005126532u, 1428155540u,
2781907007u, 943739431u,
1493961005u, 2839096988u,
2000057832u, 1941829603u,
1901484772u, 939810041u,
3377407371u, 3090115837u,
3310840540u, 2068409688u,
3261383939u, 2212130277u,
2594774045u, 2912652418u,
4179816101u, 3534504531u,
3349254805u, 2796552902u,
1385421283u, 4259908631u,
3714780837u, 3070073945u,
3372846298u, 3835884044u,
3047965714u, 3009018735u,
744091167u, 1861124263u,
2764936304u, 1338171648u,
4222019554u, 1395200692u,
1371426007u, 3338031581u,
2525665319u, 4196233786u,
2332743921u, 1474702008u,
2274266301u, 4255175517u,
2290169528u, 1793910997u,
2188254024u, 354202001u,
3864458796u, 4280290498u,
1554419340u, 1733094688u,
2010552302u, 1561807039u,
664313606u, 2548990879u,
1084699349u, 3233936866u,
973895284u, 2386881969u,
1831995860u, 2961465052u,
1428704144u, 3269904970u,
231648253u, 2602483763u,
4125013173u, 3319187387u,
3347011944u, 1892898231u,
4019114049u, 868879116u,
4085937045u, 2378411019u,
1072588531u, 3547435717u,
2208070766u, 1069899078u,
3142980597u, 2337088907u,
1593338562u, 919414554u,
688077849u, 3625708135u,
1472447348u, 1947711896u,
3953006207u, 877438080u,
845995820u, 3150361443u,
3053496713u, 2484577841u,
224271045u, 2914958001u,
2682612949u, 806655563u,
2436224507u, 1907729235u,
2920583824u, 1251814062u,
2070814520u, 4034325578u,
497847539u, 2714317144u,
385182008u, 640855184u,
1327075087u, 1062468773u,
1757405994u, 1374270191u,
4263183176u, 3041193150u,
1037871524u, 3633173991u,
4231821821u, 2830131945u,
3505072908u, 2830570613u,
4195208715u, 575398021u,
3992840257u, 3691788221u,
1949847968u, 2999344380u,
3183782163u, 3723754342u,
759716128u, 3284107364u,
1714496583u, 15918244u,
820509475u, 2553936299u,
2201876606u, 4237151697u,
2605688266u, 3253705097u,
1008333207u, 712158730u,
1722280252u, 1933868287u,
4152736859u, 2097020806u,
584426382u, 2836501956u,
2522777566u, 1996172430u,
2122199776u, 1069285218u,
1474209360u, 690831894u,
107482532u, 3695525410u,
670591796u, 768977505u,
2412057331u, 3647886687u,
3110327607u, 1072658422u,
379861934u, 1557579480u,
4124127129u, 2271365865u,
3880613089u, 739218494u,
547346027u, 388559045u,
3147335977u, 176230425u,
3094853730u, 2554321205u,
1495176194u, 4093461535u,
3521297827u, 4108148413u,
1913727929u, 1177947623u,
1911655402u, 1053371241u,
3265708874u, 1266515850u,
1045540427u, 3194420196u,
3717104621u, 1144474110u,
1464392345u, 52070157u,
4144237690u, 3350490823u,
4166253320u, 2747410691u,
};

// Return false only if offset is -1 and a spot check of 3 hashes all yield 0.
bool Test(int offset, int len = 0) {
#undef Check
#undef IsAlive

#define Check(x) do {                           \
  bool ok = expected[index++] == (x);           \
  assert(ok);                                   \
  errors += !ok;                                \
} while (0)

#define IsAlive(x) do { alive += IsNonZero(x); } while (0)

  // After the following line is where the uses of "Check" and such will go.
  static int index = 0;
if (offset == -1) { int alive = 0; { uint64_t h = farmhashna::Hash64WithSeeds(data, len++, SEED0, SEED1); IsAlive(h >> 32); IsAlive((h << 32) >> 32); } { uint64_t h = farmhashna::Hash64WithSeed(data, len++, SEED); IsAlive(h >> 32); IsAlive((h << 32) >> 32); } { uint64_t h = farmhashna::Hash64(data, len++); IsAlive(h >> 32); IsAlive((h << 32) >> 32); } len -= 3; return alive > 0; }
{ uint64_t h = farmhashna::Hash64WithSeeds(data + offset, len, SEED0, SEED1); Check(h >> 32); Check((h << 32) >> 32); }
{ uint64_t h = farmhashna::Hash64WithSeed(data + offset, len, SEED); Check(h >> 32); Check((h << 32) >> 32); }
{ uint64_t h = farmhashna::Hash64(data + offset, len); Check(h >> 32); Check((h << 32) >> 32); }

  return true;
#undef Check
#undef IsAlive
}

int RunTest() {
  Setup();
  int i = 0;
  cout << "Running farmhashnaTest";
  if (!Test(-1)) {
    cout << "... Unavailable\n";
    return NoteErrors();
  }
  // Good.  The function is attempting to hash, so run the full test.
  int errors_prior_to_test = errors;
  for ( ; i < kTestSize - 1; i++) {
    Test(i * i, i);
  }
  for ( ; i < kDataSize; i += i / 7) {
    Test(0, i);
  }
  Test(0, kDataSize);
  cout << (errors == errors_prior_to_test ? "... OK\n" : "... Failed\n");
  return NoteErrors();
}

#else

// After the following line is where the code to print hash codes will go.
void Dump(int offset, int len) {
{ uint64_t h = farmhashna::Hash64WithSeeds(data + offset, len, SEED0, SEED1); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
{ uint64_t h = farmhashna::Hash64WithSeed(data + offset, len, SEED); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
{ uint64_t h = farmhashna::Hash64(data + offset, len); cout << (h >> 32) << "u, " << ((h << 32) >> 32) << "u," << endl; }
}

#endif

#undef SEED
#undef SEED1
#undef SEED0

}  // namespace farmhashnaTest

#if TESTING

static int farmhashnaTestResult = farmhashnaTest::RunTest();

#else
int main(int argc, char** argv) {
  Setup();
  cout << "uint32_t expected[] = {\n";
  int i = 0;
  for ( ; i < kTestSize - 1; i++) {
    farmhashnaTest::Dump(i * i, i);
  }
  for ( ; i < kDataSize; i += i / 7) {
    farmhashnaTest::Dump(0, i);
  }
  farmhashnaTest::Dump(0, kDataSize);
  cout << "};\n";
}
#endif
#ifndef FARMHASH_SELF_TEST_GUARD
#define FARMHASH_SELF_TEST_GUARD
#include <string.h>
#include <cstdio>
#include <iostream>

using std::cout;
using std::cerr;
using std::endl;
using std::hex;

static const uint64_t kSeed0 = 1234567;
static const uint64_t kSeed1 = k0;
static const int kDataSize = 1 << 20;
static const int kTestSize = 300;
#define kSeed128 Uint128(kSeed0, kSeed1)

static char data[kDataSize];

static int completed_self_tests = 0;
static int errors = 0;

// Initialize data to pseudorandom values.
void Setup() {
  if (completed_self_tests == 0) {
    uint64_t a = 9;
    uint64_t b = 777;
    for (int i = 0; i < kDataSize; i++) {
      a += b;
      b += a;
      a = (a ^ (a >> 41)) * k0;
      b = (b ^ (b >> 41)) * k0 + i;
      uint8_t u = b >> 37;
      memcpy(data + i, &u, 1);  // uint8_t -> char
    }
  }
}

int NoteErrors() {
#define NUM_SELF_TESTS 6
  if (++completed_self_tests == NUM_SELF_TESTS)
    std::exit(errors > 0);
  return errors;
}

template <typename T> inline bool IsNonZero(T x) {
  return x != 0;
}

template <> inline bool IsNonZero<uint128_t>(uint128_t x) {
  return x != Uint128(0, 0);
}

#endif  // FARMHASH_SELF_TEST_GUARD

namespace farmhashnsTest {

uint32_t CreateSeed(int offset, int salt) {
  uint32_t h = static_cast<uint32_t>(salt & 0xffffffff);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h += static_cast<uint32_t>(offset & 0xffffffff);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  return h;
}

#undef SEED
#undef SEED1
#undef SEED0
#define SEED CreateSeed(offset, -1)
#define SEED0 CreateSeed(offset, 0)
#define SEED1 CreateSeed(offset, 1)

#undef TESTING
#define TESTING 1
#if TESTING
uint32_t expected[] = {
2681724312u,
797982799u,
921001710u,
2134990486u,
2244477846u,
2992121793u,
3943596029u,
452431531u,
2557197665u,
2532580744u,
3099673830u,
3696623795u,
3281581178u,
1882212500u,
275903667u,
3033004529u,
1402319660u,
2699376854u,
4222949502u,
1712034059u,
1330324210u,
2921867846u,
1728752234u,
326029180u,
3349570000u,
1612122221u,
1646032583u,
1432476832u,
3552092450u,
1499109081u,
1554038301u,
3190844552u,
540224401u,
489963606u,
1562872448u,
2128624475u,
1262831810u,
1672724608u,
2077310004u,
1911523866u,
294527927u,
1389770549u,
2026137563u,
629449419u,
2489287368u,
645684964u,
230403464u,
3272648435u,
165370827u,
1230085527u,
3628174014u,
851743255u,
1554380634u,
3667013118u,
2290487377u,
1909203251u,
1498556724u,
4165088768u,
197618179u,
914413116u,
1913303225u,
3117299654u,
1357272220u,
507436733u,
1413396341u,
146044391u,
429095991u,
1578546616u,
366414107u,
1207522198u,
1684583131u,
1157614300u,
520792961u,
586863115u,
4033596884u,
4140791139u,
3242407770u,
232064808u,
816692935u,
3748861010u,
517646945u,
648000590u,
3047062993u,
4027776454u,
382936554u,
1973395102u,
2826990641u,
1029055034u,
1758123094u,
325737734u,
3338548567u,
3698087965u,
3198590202u,
191910725u,
542201663u,
2135941665u,
3948351189u,
3252374102u,
1467786451u,
3444053918u,
1062268187u,
4081398201u,
2560479831u,
4225182569u,
3067277639u,
1709989541u,
59581167u,
3639843023u,
4189944477u,
877580602u,
2062343506u,
3762572073u,
3284356565u,
732225574u,
3532596884u,
1652884780u,
259034107u,
1426140634u,
3200749877u,
24035717u,
1115203611u,
3146815575u,
1778459926u,
579625482u,
2457048126u,
389846205u,
862072556u,
1481069623u,
701920051u,
3388062747u,
1005815394u,
734239551u,
1279682138u,
49703572u,
2509302188u,
2815915291u,
4017598378u,
3035635454u,
12886044u,
2627383582u,
855990313u,
263366740u,
3405007814u,
1190977418u,
2514169310u,
4129538640u,
3625507637u,
2993032712u,
2183845740u,
1116991810u,
462795667u,
1343017609u,
25485284u,
1623631848u,
573836428u,
1937681565u,
1668258120u,
954762543u,
732086117u,
2936126607u,
3171090854u,
1927385370u,
1492209542u,
2148675559u,
2760941207u,
1338083267u,
314727461u,
2084630531u,
3129033323u,
636616055u,
470463518u,
408721884u,
357324860u,
2691859523u,
1185564327u,
1975527044u,
1943802836u,
1490330107u,
448403661u,
1910401882u,
3201262636u,
2554452696u,
1852004679u,
2803250686u,
1022551180u,
839529273u,
2597259793u,
3909443124u,
2711436388u,
837475154u,
1068395209u,
484603494u,
3914002299u,
268427550u,
2914011058u,
2849988118u,
3406991497u,
2102063419u,
1246595599u,
1539151988u,
991511607u,
2005032160u,
164940926u,
116647396u,
1764165478u,
2159170082u,
1723308975u,
2017579106u,
2264728166u,
1694443528u,
4058183171u,
505662155u,
1898176786u,
1511077569u,
2055059789u,
2089123665u,
3204250304u,
1120017626u,
780634378u,
4029205195u,
1953796601u,
136118734u,
3063437608u,
1403506686u,
4055855649u,
2562064338u,
2858726767u,
3071338162u,
1189614342u,
771592405u,
1941874618u,
4032960199u,
752188080u,
308584855u,
3760952096u,
2565680167u,
3471066607u,
3770488806u,
3738784936u,
1255084262u,
1831557743u,
54945052u,
3442180039u,
2432427547u,
1356028512u,
1280920000u,
4135481831u,
1121403845u,
3293015483u,
713121337u,
2976737859u,
927011680u,
2118505126u,
1958963937u,
910892050u,
4075249328u,
1240000030u,
3026358429u,
1241665335u,
3615577014u,
2296824134u,
3087190425u,
1034244398u,
2515339233u,
2502657424u,
460237542u,
1808504491u,
2069753399u,
3292597295u,
356742959u,
3248055817u,
1750561299u,
3810297651u,
3384018814u,
2316548367u,
451656820u,
1745659881u,
2390172694u,
4102497288u,
164402616u,
3861555476u,
1767810825u,
472304191u,
3323383489u,
2963590112u,
207428029u,
3472047571u,
2360400900u,
884421165u,
1377764574u,
3604258095u,
1099809675u,
3741651161u,
3542220540u,
2521038253u,
337070226u,
641040550u,
1306761320u,
1383997679u,
4109252858u,
2252520167u,
1788337208u,
1012411364u,
2911512007u,
4294520281u,
3071359622u,
2357687350u,
3898950547u,
1027027239u,
2040551642u,
2137668425u,
3565689036u,
3589545214u,
1864569342u,
3153745937u,
490608221u,
1604548872u,
3287246572u,
1713154780u,
500120236u,
2489716881u,
1561519055u,
1005636939u,
2774151984u,
3144450144u,
96459446u,
250533792u,
4237425634u,
1187061987u,
4100839753u,
3784939568u,
4246879223u,
124492786u,
3476334357u,
820852908u,
2511026735u,
1528632094u,
556796152u,
3692729434u,
2913077464u,
3158127917u,
4046477658u,
692059110u,
990407433u,
1540183799u,
2926590471u,
3178387550u,
82077489u,
2853224222u,
4190838199u,
4095846095u,
1583801700u,
432327540u,
3912423882u,
4189387259u,
2540185277u,
1679786240u,
4051584612u,
3454981037u,
1675560450u,
2222395828u,
405251683u,
1385561439u,
4071581802u,
2287305551u,
803575837u,
2452657767u,
3841480082u,
2350937598u,
779434428u,
3692865672u,
2285701422u,
215970497u,
823305654u,
2272612521u,
4159715581u,
552925303u,
3198900547u,
4064071435u,
4194096960u,
3671038966u,
1719108984u,
406757708u,
531310503u,
3037314475u,
3382290593u,
3842309471u,
3241407531u,
2512514774u,
1397502982u,
3139578968u,
811750340u,
3622282782u,
2540585554u,
4146963980u,
943914610u,
3054347639u,
1911188923u,
2338031599u,
3181425568u,
1196757691u,
240953857u,
240495962u,
3828377737u,
2246245780u,
4262383425u,
841480070u,
4051263539u,
4164532914u,
1683612329u,
2368092311u,
2283918569u,
3923500892u,
350160869u,
1469342315u,
1891558063u,
13327420u,
330624974u,
3543885677u,
376390582u,
2968738516u,
3187805406u,
645016762u,
1928519266u,
1610271373u,
2108753646u,
191994904u,
2247006571u,
1106275740u,
917121602u,
2845309942u,
2864033668u,
1102873346u,
2006922227u,
1983773590u,
3449066284u,
2741371614u,
786322314u,
2974240289u,
3263135197u,
521432811u,
3206261120u,
976892272u,
1781944746u,
2209584557u,
1109175923u,
1091877599u,
1129462471u,
3273688770u,
3389003793u,
2502161880u,
1164309901u,
7371540u,
3626554867u,
1145247203u,
3656006011u,
1696355359u,
3155218919u,
2917345728u,
1854985978u,
1628881950u,
878608872u,
2069566979u,
3163786257u,
2933010098u,
1256485167u,
122035049u,
2083771672u,
508560958u,
2770847216u,
456842861u,
3992583643u,
4281971893u,
900741486u,
2825943628u,
300318232u,
2533900859u,
542270815u,
3320103693u,
1216399252u,
639941430u,
3652676161u,
4100211814u,
3262252593u,
2315856188u,
411263051u,
3250435765u,
1967599860u,
4020453639u,
2682611693u,
3802058181u,
3286110054u,
471725410u,
3623364733u,
721788662u,
1615375832u,
1310964134u,
4145497671u,
1492533854u,
2686506989u,
3342031659u,
2151665147u,
2754346599u,
1178454681u,
3751680858u,
2601416506u,
748595836u,
238887261u,
1885975275u,
2367569534u,
741809437u,
3539886328u,
2748286642u,
1390394371u,
3005091922u,
793108368u,
1529669805u,
2332660395u,
2217730223u,
2634687611u,
442806463u,
1968135266u,
454523002u,
3177866230u,
2808960136u,
4259114138u,
4103264843u,
3103714075u,
2462967542u,
1466891491u,
477973764u,
834565647u,
741089037u,
218837573u,
1710536528u,
2469088212u,
1229072375u,
2828341u,
176923431u,
985763350u,
4095477420u,
1984145538u,
1870791084u,
674956677u,
1978138947u,
1296493993u,
1818183554u,
3443333721u,
2124949983u,
2549590262u,
2700850794u,
2662736367u,
739638109u,
4061447096u,
2960078422u,
2453781158u,
929570940u,
3200328383u,
2406328791u,
1419180666u,
2152455739u,
2805741044u,
3305999074u,
3183816361u,
2303165050u,
4922104u,
63096005u,
936656347u,
3104453886u,
1088673880u,
1113407526u,
1457890086u,
453478383u,
1107686695u,
3626027824u,
1159687359u,
2248467888u,
2004578380u,
3274954621u,
1787958646u,
2628726704u,
1138419798u,
3735442315u,
692385301u,
313807213u,
2329068673u,
59375364u,
3261084359u,
2088644507u,
2471153194u,
788336435u,
4024527246u,
141504460u,
2307553888u,
1930559950u,
48975711u,
2745693338u,
230161982u,
3429230862u,
1335968626u,
609591304u,
57435073u,
4279281136u,
3152151665u,
3984484924u,
3459883943u,
397478330u,
1738762229u,
3033590066u,
3611539498u,
1363463523u,
3319364965u,
2671169141u,
3819548561u,
1691193757u,
2423834608u,
2820147055u,
1378120632u,
1240565187u,
3180720050u,
680831086u,
3309658414u,
1986166490u,
762099827u,
510883662u,
2047373648u,
3606742294u,
3894965352u,
2342078853u,
1091255717u,
776594727u,
3217317445u,
1574468485u,
3844504016u,
2819598918u,
1037401010u,
2550943503u,
3867184001u,
1687911772u,
165313836u,
1679575281u,
2418947263u,
2038774952u,
3913543652u,
3209155736u,
149905221u,
3859604717u,
713919631u,
4069810796u,
1882959164u,
1019939034u,
2379867302u,
3666323035u,
1157389013u,
2422300650u,
3366777340u,
2526452062u,
1313747885u,
1039617868u,
1620553692u,
2032976978u,
578789528u,
1592846839u,
2270630604u,
897850577u,
1603294178u,
3105664807u,
1442670138u,
1728019360u,
79313861u,
1683031101u,
1913067024u,
4070719870u,
708986470u,
2586453359u,
3993348863u,
3358251279u,
3003552537u,
750174793u,
836888956u,
4190747426u,
4251291318u,
4145164938u,
1366883260u,
1912910955u,
510192669u,
1851315039u,
3574241274u,
3220062924u,
2821142039u,
1317082195u,
2274293302u,
1839219569u,
126586168u,
3989293643u,
2680178207u,
347056948u,
799681430u,
2864517481u,
3180404853u,
213140045u,
1956305184u,
1474675286u,
3085723423u,
2841859626u,
308421914u,
3670309263u,
1765052231u,
245459238u,
113434331u,
4079521092u,
2115235526u,
2943408816u,
1055476938u,
1506442339u,
2291296392u,
3267864332u,
1282145528u,
3700108015u,
1932843667u,
2677701670u,
6041177u,
3889648557u,
1461025478u,
};

// Return false only if offset is -1 and a spot check of 3 hashes all yield 0.
bool Test(int offset, int len = 0) {
#undef Check
#undef IsAlive

#define Check(x) do {                           \
  bool ok = expected[index++] == (x);           \
  assert(ok);                                   \
  errors += !ok;                                \
} while (0)

#define IsAlive(x) do { alive += IsNonZero(x); } while (0)

  // After the following line is where the uses of "Check" and such will go.
  static int index = 0;
if (offset == -1) { int alive = 0; IsAlive(farmhashns::Hash32WithSeed(data, len++, SEED)); IsAlive(farmhashns::Hash32(data, len++)); IsAlive(farmhashns::Hash32(data, len++)); len -= 3; return alive > 0; }
Check(farmhashns::Hash32WithSeed(data + offset, len, SEED));
Check(farmhashns::Hash32(data + offset, len));

  return true;
#undef Check
#undef IsAlive
}

int RunTest() {
  Setup();
  int i = 0;
  cout << "Running farmhashnsTest";
  if (!Test(-1)) {
    cout << "... Unavailable\n";
    return NoteErrors();
  }
  // Good.  The function is attempting to hash, so run the full test.
  int errors_prior_to_test = errors;
  for ( ; i < kTestSize - 1; i++) {
    Test(i * i, i);
  }
  for ( ; i < kDataSize; i += i / 7) {
    Test(0, i);
  }
  Test(0, kDataSize);
  cout << (errors == errors_prior_to_test ? "... OK\n" : "... Failed\n");
  return NoteErrors();
}

#else

// After the following line is where the code to print hash codes will go.
void Dump(int offset, int len) {
cout << farmhashns::Hash32WithSeed(data + offset, len, SEED) << "u," << endl;
cout << farmhashns::Hash32(data + offset, len) << "u," << endl;
}

#endif

#undef SEED
#undef SEED1
#undef SEED0

}  // namespace farmhashnsTest

#if TESTING

static int farmhashnsTestResult = farmhashnsTest::RunTest();

#else
int main(int argc, char** argv) {
  Setup();
  cout << "uint32_t expected[] = {\n";
  int i = 0;
  for ( ; i < kTestSize - 1; i++) {
    farmhashnsTest::Dump(i * i, i);
  }
  for ( ; i < kDataSize; i += i / 7) {
    farmhashnsTest::Dump(0, i);
  }
  farmhashnsTest::Dump(0, kDataSize);
  cout << "};\n";
}
#endif
#ifndef FARMHASH_SELF_TEST_GUARD
#define FARMHASH_SELF_TEST_GUARD
#include <string.h>
#include <cstdio>
#include <iostream>

using std::cout;
using std::cerr;
using std::endl;
using std::hex;

static const uint64_t kSeed0 = 1234567;
static const uint64_t kSeed1 = k0;
static const int kDataSize = 1 << 20;
static const int kTestSize = 300;
#define kSeed128 Uint128(kSeed0, kSeed1)

static char data[kDataSize];

static int completed_self_tests = 0;
static int errors = 0;

// Initialize data to pseudorandom values.
void Setup() {
  if (completed_self_tests == 0) {
    uint64_t a = 9;
    uint64_t b = 777;
    for (int i = 0; i < kDataSize; i++) {
      a += b;
      b += a;
      a = (a ^ (a >> 41)) * k0;
      b = (b ^ (b >> 41)) * k0 + i;
      uint8_t u = b >> 37;
      memcpy(data + i, &u, 1);  // uint8_t -> char
    }
  }
}

int NoteErrors() {
#define NUM_SELF_TESTS 6
  if (++completed_self_tests == NUM_SELF_TESTS)
    std::exit(errors > 0);
  return errors;
}

template <typename T> inline bool IsNonZero(T x) {
  return x != 0;
}

template <> inline bool IsNonZero<uint128_t>(uint128_t x) {
  return x != Uint128(0, 0);
}

#endif  // FARMHASH_SELF_TEST_GUARD

namespace farmhashsaTest {

uint32_t CreateSeed(int offset, int salt) {
  uint32_t h = static_cast<uint32_t>(salt & 0xffffffff);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h += static_cast<uint32_t>(offset & 0xffffffff);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  return h;
}

#undef SEED
#undef SEED1
#undef SEED0
#define SEED CreateSeed(offset, -1)
#define SEED0 CreateSeed(offset, 0)
#define SEED1 CreateSeed(offset, 1)

#undef TESTING
#define TESTING 1
#if TESTING
uint32_t expected[] = {
4223616069u,
3696677242u,
4081014168u,
2576519988u,
2212771159u,
1112731063u,
1020067935u,
3955445564u,
1451961420u,
653440099u,
31917516u,
2957164615u,
2590087362u,
3879448744u,
176305566u,
2447367541u,
1359016305u,
3363804638u,
1117290165u,
1062549743u,
2437877004u,
1894455839u,
673206794u,
3486923651u,
3269862919u,
2303349487u,
1380660650u,
595525107u,
1525325287u,
2025609358u,
176408838u,
1592885012u,
864896482u,
2101378090u,
3489229104u,
2118965695u,
581644891u,
2718789079u,
631613207u,
4228658372u,
3867875546u,
3531368319u,
3804516756u,
3317755099u,
1619744564u,
2884717286u,
1088213445u,
2667691076u,
3727873235u,
2330406762u,
858590707u,
123802208u,
4150036245u,
182283099u,
1478882570u,
3282617403u,
819171187u,
1172627392u,
4254302102u,
2957028020u,
437030323u,
2452147680u,
2868246750u,
3530169402u,
3154852132u,
215019192u,
357580983u,
1354454461u,
1108813287u,
2324008118u,
2315997713u,
4181601562u,
1360882441u,
92423273u,
3048866755u,
3369188505u,
3664371439u,
2920710428u,
1027891570u,
2653166430u,
3461888315u,
1475780447u,
292769636u,
1737473313u,
4064110516u,
4170160075u,
762850927u,
3630603695u,
2803307356u,
844987665u,
460980967u,
3005635467u,
2802568977u,
588668033u,
2148940781u,
3239099984u,
1266953698u,
3197808789u,
3519942533u,
2511995334u,
2553810188u,
871667697u,
1358675720u,
1499319171u,
2044931270u,
1210355103u,
807152540u,
3262320756u,
2810214575u,
1813386141u,
4089465863u,
903928165u,
1388899322u,
3209183659u,
834536144u,
2733354550u,
2742289921u,
3689042563u,
2655593281u,
4169686303u,
415985561u,
138892376u,
516115393u,
65683883u,
4162865100u,
889944635u,
313566528u,
3346420907u,
1504303591u,
2256809275u,
742243229u,
779775302u,
3140940172u,
2312556111u,
2304095772u,
1151741606u,
2194712422u,
1714084652u,
3272736835u,
1311540658u,
191179665u,
3996605106u,
1657345233u,
4205442903u,
1553339212u,
2351843044u,
1647502006u,
2525516233u,
292202846u,
1498646290u,
1429323381u,
974274898u,
3759331561u,
2881238887u,
826787221u,
1069622448u,
221991032u,
1462969082u,
2799661508u,
364022781u,
2594244377u,
797773898u,
4097839290u,
1529150125u,
2456805570u,
541503425u,
3936326142u,
3112719954u,
775223581u,
3074018423u,
3198488875u,
1772191849u,
2456535211u,
3154686028u,
1520862019u,
4005829426u,
1306433767u,
1943028506u,
2246000782u,
1057766454u,
3761996982u,
3441075333u,
898641979u,
3450209088u,
3941329307u,
3289922449u,
3085075827u,
1814193220u,
690422997u,
2627846676u,
2653520704u,
3739145533u,
3996776010u,
2287072592u,
1346671698u,
3082629900u,
2298811274u,
3639722036u,
1729419228u,
1836765953u,
3708118742u,
213436u,
950223749u,
3734247682u,
2924575678u,
1382024841u,
2431637732u,
3448846682u,
1341301397u,
4206956590u,
1730650902u,
2581075456u,
1542359141u,
707222542u,
2925350541u,
3846303536u,
3579103295u,
3932175763u,
1339615732u,
848825750u,
1070170828u,
1964973818u,
577060344u,
607721296u,
4031023048u,
406883794u,
3991905552u,
1198544082u,
872468460u,
1044847096u,
3159976313u,
3020028266u,
2108700400u,
3373767922u,
264431841u,
2817097007u,
3700061048u,
1733731531u,
3459415893u,
80378591u,
1479875104u,
19735612u,
1382658977u,
3416562245u,
1959852842u,
2384002344u,
124683828u,
3725782174u,
2300301222u,
393852269u,
1302492002u,
3623776492u,
3787086417u,
1730024749u,
1710531361u,
443700716u,
1461987482u,
671998131u,
3018380746u,
2592292305u,
3390799372u,
3945101155u,
3743494852u,
3716045582u,
996005166u,
320698449u,
3420221765u,
1518157951u,
2555810666u,
3381929684u,
2019638523u,
3088262796u,
2072178906u,
3433649364u,
203906916u,
34663784u,
290301305u,
1188021504u,
3754681145u,
3920313139u,
2840496520u,
1656802962u,
2288475489u,
3399185138u,
1296000826u,
2362384746u,
309633360u,
2719851778u,
776035930u,
3200733043u,
365690832u,
3326378243u,
1500331457u,
1625708592u,
4230903462u,
715344888u,
3363777768u,
2243620288u,
2890765789u,
553154234u,
4044100108u,
4056887320u,
1185656496u,
3671476744u,
1064586897u,
1154949698u,
3493481974u,
1294573722u,
1869224012u,
2530084956u,
995321553u,
833419249u,
563815282u,
250258043u,
2970801822u,
441007535u,
42246961u,
2820426655u,
2878882436u,
2363245780u,
2138489282u,
2972360481u,
2312619393u,
3598664848u,
3071556076u,
776990325u,
3220427357u,
2257939577u,
3817305903u,
1502979698u,
3159755934u,
3955997276u,
2423850008u,
1959927572u,
1219782288u,
4119776679u,
1124253854u,
3678052422u,
2620644947u,
1262408666u,
3480072280u,
2627137665u,
807538749u,
3276646337u,
518510128u,
1137828655u,
1498449110u,
3031692317u,
1125635969u,
1130096111u,
780007336u,
3111856399u,
1014917264u,
780877352u,
2909458336u,
4235949214u,
2423879289u,
275888892u,
3891926795u,
3538163953u,
54815161u,
162228302u,
258154068u,
3554455591u,
1801469029u,
2801563220u,
726560058u,
2450221940u,
3677582978u,
440993800u,
424762443u,
2624525253u,
2587715329u,
2292264424u,
1074856749u,
3294752007u,
3164112672u,
2399146799u,
1920182465u,
3858835361u,
193755240u,
3333610311u,
1757504059u,
2576027039u,
2775253365u,
2939191561u,
1046147275u,
235149906u,
4262218222u,
2900542726u,
2260154702u,
1019551635u,
1194720570u,
3519118691u,
3039483153u,
84918216u,
3053381097u,
2572396843u,
3849763371u,
2782686780u,
3710049554u,
3403430713u,
2346080784u,
2496307442u,
1597281872u,
696018239u,
704625714u,
623026921u,
3182413559u,
3794540330u,
305497722u,
1592680199u,
2377854072u,
3060601746u,
3953057908u,
3941551588u,
1033716182u,
2765716854u,
1309699058u,
3519400181u,
3073370877u,
115583008u,
4032909296u,
2944563574u,
3762753718u,
192842727u,
1711348701u,
3086147235u,
1658229443u,
1479783872u,
3839977157u,
225619117u,
1349684817u,
1964813173u,
565753187u,
2530252046u,
840014353u,
1645183704u,
3668429078u,
3438418557u,
639704059u,
360837811u,
2531807958u,
1572353913u,
2116037299u,
1948437512u,
744553393u,
2380697034u,
3775234105u,
3816065157u,
301868653u,
2960939561u,
3306528247u,
2389296549u,
805918610u,
1759358265u,
1760876328u,
2827601706u,
2944594708u,
3313666458u,
2022601495u,
730938791u,
193539397u,
2026103244u,
802928398u,
2630934308u,
782805818u,
3499326016u,
293509489u,
3646131514u,
3182478647u,
854800333u,
2284531628u,
438528022u,
2339298129u,
1692289216u,
2427728723u,
46501288u,
350652353u,
1355971222u,
889682372u,
944799254u,
2763906061u,
2807550612u,
2683762637u,
100870317u,
2449357318u,
2638348436u,
4206088869u,
1788948473u,
3537588549u,
2782490204u,
134406470u,
2409190528u,
2362439849u,
1861661528u,
2101513194u,
1424834765u,
3581765745u,
3185999525u,
2057487100u,
2303941176u,
3639628788u,
1180265315u,
230437935u,
2108319366u,
1131685143u,
1055685292u,
1509007009u,
1258485140u,
560525005u,
3598799040u,
3835680585u,
1851859628u,
332858996u,
641769248u,
4252450037u,
865386707u,
720719117u,
3133612164u,
3833045874u,
3492515435u,
2465970289u,
4234420011u,
573859916u,
252532886u,
870392318u,
4051320920u,
894929092u,
3748361688u,
699355960u,
1885212350u,
1609756949u,
461896870u,
1337065461u,
1775211059u,
1786193749u,
2815154643u,
2128729882u,
969639529u,
3960427545u,
859416958u,
2739758802u,
2698032197u,
2813292418u,
1985467524u,
396604317u,
4122172759u,
1201259789u,
4282051702u,
3270018895u,
961215209u,
961075860u,
4211926998u,
4088374597u,
577510509u,
3058349487u,
4025377754u,
2815478438u,
471023164u,
3947959608u,
4161486934u,
2299888461u,
1103571511u,
2450153872u,
1839939275u,
108299608u,
858086440u,
1030152945u,
3895328530u,
3009080718u,
3690840454u,
3847025277u,
152331362u,
161365689u,
831319961u,
2166017294u,
3945322722u,
4059970216u,
1420824131u,
2770648308u,
1567250186u,
2181067149u,
1939743488u,
3080158120u,
3435218248u,
2495237495u,
3814085102u,
3180983013u,
3199054292u,
2204745908u,
1140337267u,
2213569784u,
1941879842u,
2105562605u,
3618835614u,
2247103645u,
2492473487u,
856414299u,
166022030u,
4080104712u,
3218935344u,
3284220561u,
4261581452u,
1206944836u,
3496705432u,
2215996876u,
3154627465u,
3384005496u,
742170556u,
1333047620u,
802680366u,
156833431u,
2682100354u,
2493654830u,
584848366u,
1691693131u,
2169934170u,
779968026u,
2099545800u,
1423039695u,
4292110968u,
4266576788u,
149142597u,
748501873u,
3865014822u,
1913588198u,
130285614u,
3500768879u,
915458923u,
3071792750u,
1339986633u,
4143929149u,
4048379479u,
725193827u,
1375113643u,
2425277412u,
4144659274u,
465714768u,
226991589u,
2212127704u,
3936145258u,
2891024846u,
3816000225u,
979331165u,
1749907536u,
53847318u,
1462525833u,
2961425455u,
368859113u,
3572721452u,
453048644u,
1628629918u,
3497673923u,
3619079585u,
139870565u,
1518176798u,
3933074281u,
1878623729u,
2074035641u,
3016759257u,
1313053591u,
2557706970u,
2348296582u,
962370022u,
2337285014u,
1618936717u,
1915877085u,
2743743122u,
3250783882u,
1346652536u,
143311109u,
2443788461u,
1048248964u,
2806619339u,
3263266976u,
1668146349u,
3397428868u,
3276188862u,
1774196343u,
1993847813u,
2771079610u,
476672419u,
2119050359u,
2918326659u,
2245402721u,
2692910474u,
2374383269u,
342400227u,
2961437795u,
3899230368u,
337787132u,
3664444935u,
1269451153u,
2971526729u,
1486511182u,
791070133u,
2570319890u,
3482497490u,
2134230518u,
4273391202u,
1825511330u,
3947753714u,
1389755724u,
3995075516u,
2081052615u,
3626343470u,
4213603435u,
2137917278u,
2898987303u,
3059215715u,
3383237881u,
3003674434u,
409174425u,
1911915604u,
2087728055u,
2942005882u,
3386522440u,
714936074u,
261924004u,
3268784033u,
1141188757u,
2413217552u,
1515163433u,
};

// Return false only if offset is -1 and a spot check of 3 hashes all yield 0.
bool Test(int offset, int len = 0) {
#undef Check
#undef IsAlive

#define Check(x) do {                           \
  bool ok = expected[index++] == (x);           \
  assert(ok);                                   \
  errors += !ok;                                \
} while (0)

#define IsAlive(x) do { alive += IsNonZero(x); } while (0)

  // After the following line is where the uses of "Check" and such will go.
  static int index = 0;
if (offset == -1) { int alive = 0; IsAlive(farmhashsa::Hash32WithSeed(data, len++, SEED)); IsAlive(farmhashsa::Hash32(data, len++)); IsAlive(farmhashsa::Hash32(data, len++)); len -= 3; return alive > 0; }
Check(farmhashsa::Hash32WithSeed(data + offset, len, SEED));
Check(farmhashsa::Hash32(data + offset, len));

  return true;
#undef Check
#undef IsAlive
}

int RunTest() {
  Setup();
  int i = 0;
  cout << "Running farmhashsaTest";
  if (!Test(-1)) {
    cout << "... Unavailable\n";
    return NoteErrors();
  }
  // Good.  The function is attempting to hash, so run the full test.
  int errors_prior_to_test = errors;
  for ( ; i < kTestSize - 1; i++) {
    Test(i * i, i);
  }
  for ( ; i < kDataSize; i += i / 7) {
    Test(0, i);
  }
  Test(0, kDataSize);
  cout << (errors == errors_prior_to_test ? "... OK\n" : "... Failed\n");
  return NoteErrors();
}

#else

// After the following line is where the code to print hash codes will go.
void Dump(int offset, int len) {
cout << farmhashsa::Hash32WithSeed(data + offset, len, SEED) << "u," << endl;
cout << farmhashsa::Hash32(data + offset, len) << "u," << endl;
}

#endif

#undef SEED
#undef SEED1
#undef SEED0

}  // namespace farmhashsaTest

#if TESTING

static int farmhashsaTestResult = farmhashsaTest::RunTest();

#else
int main(int argc, char** argv) {
  Setup();
  cout << "uint32_t expected[] = {\n";
  int i = 0;
  for ( ; i < kTestSize - 1; i++) {
    farmhashsaTest::Dump(i * i, i);
  }
  for ( ; i < kDataSize; i += i / 7) {
    farmhashsaTest::Dump(0, i);
  }
  farmhashsaTest::Dump(0, kDataSize);
  cout << "};\n";
}
#endif
#ifndef FARMHASH_SELF_TEST_GUARD
#define FARMHASH_SELF_TEST_GUARD
#include <string.h>
#include <cstdio>
#include <iostream>

using std::cout;
using std::cerr;
using std::endl;
using std::hex;

static const uint64_t kSeed0 = 1234567;
static const uint64_t kSeed1 = k0;
static const int kDataSize = 1 << 20;
static const int kTestSize = 300;
#define kSeed128 Uint128(kSeed0, kSeed1)

static char data[kDataSize];

static int completed_self_tests = 0;
static int errors = 0;

// Initialize data to pseudorandom values.
void Setup() {
  if (completed_self_tests == 0) {
    uint64_t a = 9;
    uint64_t b = 777;
    for (int i = 0; i < kDataSize; i++) {
      a += b;
      b += a;
      a = (a ^ (a >> 41)) * k0;
      b = (b ^ (b >> 41)) * k0 + i;
      uint8_t u = b >> 37;
      memcpy(data + i, &u, 1);  // uint8_t -> char
    }
  }
}

int NoteErrors() {
#define NUM_SELF_TESTS 6
  if (++completed_self_tests == NUM_SELF_TESTS)
    std::exit(errors > 0);
  return errors;
}

template <typename T> inline bool IsNonZero(T x) {
  return x != 0;
}

template <> inline bool IsNonZero<uint128_t>(uint128_t x) {
  return x != Uint128(0, 0);
}

#endif  // FARMHASH_SELF_TEST_GUARD

namespace farmhashsuTest {

uint32_t CreateSeed(int offset, int salt) {
  uint32_t h = static_cast<uint32_t>(salt & 0xffffffff);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h += static_cast<uint32_t>(offset & 0xffffffff);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  h = h * c1;
  h ^= (h >> 17);
  return h;
}

#undef SEED
#undef SEED1
#undef SEED0
#define SEED CreateSeed(offset, -1)
#define SEED0 CreateSeed(offset, 0)
#define SEED1 CreateSeed(offset, 1)

#undef TESTING
#define TESTING 1
#if TESTING
uint32_t expected[] = {
4223616069u,
3696677242u,
4081014168u,
2576519988u,
2212771159u,
1112731063u,
1020067935u,
3955445564u,
1451961420u,
653440099u,
31917516u,
2957164615u,
2590087362u,
3879448744u,
176305566u,
2447367541u,
1359016305u,
3363804638u,
1117290165u,
1062549743u,
2437877004u,
1894455839u,
673206794u,
3486923651u,
3269862919u,
2303349487u,
1380660650u,
595525107u,
1525325287u,
2025609358u,
176408838u,
1592885012u,
864896482u,
2101378090u,
3489229104u,
2118965695u,
581644891u,
2718789079u,
631613207u,
4228658372u,
3867875546u,
3531368319u,
3804516756u,
3317755099u,
1619744564u,
2884717286u,
1088213445u,
2667691076u,
3727873235u,
2330406762u,
858590707u,
457744844u,
4150036245u,
2000404290u,
1478882570u,
901678172u,
819171187u,
195942998u,
4254302102u,
3967266927u,
437030323u,
4018009204u,
2868246750u,
3540087514u,
3154852132u,
3319116625u,
357580983u,
3177665294u,
1108813287u,
1253366798u,
2315997713u,
510718750u,
1360882441u,
2770216279u,
3048866755u,
3406961221u,
3664371439u,
1151145514u,
1027891570u,
2699067992u,
3461888315u,
198061905u,
292769636u,
1106771795u,
4064110516u,
3258279756u,
762850927u,
1818699721u,
2803307356u,
3919169404u,
460980967u,
3125535078u,
2802568977u,
3582546426u,
2148940781u,
3963274378u,
1266953698u,
204185123u,
1100034381u,
3009193601u,
4200651967u,
274889605u,
2700589508u,
952511689u,
3765324859u,
3465498478u,
4014967037u,
2070988082u,
2972423530u,
3068638223u,
4156773651u,
489509804u,
1323863238u,
3731914806u,
2846098469u,
2728930632u,
346814072u,
848146907u,
551160669u,
4165126521u,
2039095001u,
4179859388u,
2434936359u,
2764414551u,
238491210u,
732483969u,
3366512764u,
478307468u,
4124179572u,
4142733597u,
1953448206u,
4199329278u,
865077060u,
2627662116u,
2802499360u,
3141206831u,
1959218197u,
911371451u,
125987200u,
2821366175u,
2530992747u,
2409206225u,
117991880u,
2133402461u,
895510531u,
428719601u,
3036014536u,
1223783733u,
733793540u,
970650405u,
547701766u,
570764615u,
3224485368u,
3192714940u,
319942831u,
3940200341u,
362056204u,
2832368105u,
1853281226u,
3296434636u,
3752508307u,
604292768u,
2231940616u,
1204094681u,
866194005u,
2405201650u,
2466384396u,
380829379u,
230033818u,
2783417588u,
4249886729u,
829569301u,
2988322580u,
2299983554u,
74748560u,
737514425u,
3153050211u,
652642663u,
1270205115u,
227197032u,
2773091790u,
325849216u,
49998791u,
4043203010u,
3662748068u,
1709364383u,
1179105165u,
1478504366u,
2980456610u,
1167476429u,
1590390732u,
1306256496u,
292008135u,
374690995u,
1809200819u,
1680595904u,
646040226u,
1742445560u,
2435776844u,
3703683804u,
478742495u,
814967947u,
2698190177u,
1003617993u,
1436118705u,
217056304u,
1412287094u,
2738417466u,
2933279339u,
3461877733u,
1203141205u,
2119492857u,
1134895723u,
1560001021u,
3786320122u,
3748116258u,
3486219595u,
702138030u,
1062984182u,
232789133u,
1566523968u,
3885443778u,
1820171888u,
3655858585u,
2316903005u,
2678779620u,
395625433u,
1609107564u,
3108726411u,
2937837224u,
3911907151u,
557272509u,
3893435978u,
1542613576u,
1079886893u,
2624566322u,
1413700616u,
2796974006u,
1922556114u,
562820464u,
2845409784u,
54180312u,
1898782464u,
3681814953u,
2417064617u,
1815464483u,
911626132u,
2964575550u,
1852696128u,
2319647785u,
1998904590u,
619992689u,
3073207513u,
1238163512u,
3199435982u,
828667254u,
3561155502u,
3943095163u,
1045711849u,
2238679131u,
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1461025478u,
};

// Return false only if offset is -1 and a spot check of 3 hashes all yield 0.
bool Test(int offset, int len = 0) {
#undef Check
#undef IsAlive

#define Check(x) do {                           \
  bool ok = expected[index++] == (x);           \
  assert(ok);                                   \
  errors += !ok;                                \
} while (0)

#define IsAlive(x) do { alive += IsNonZero(x); } while (0)

  // After the following line is where the uses of "Check" and such will go.
  static int index = 0;
if (offset == -1) { int alive = 0; IsAlive(farmhashsu::Hash32WithSeed(data, len++, SEED)); IsAlive(farmhashsu::Hash32(data, len++)); IsAlive(farmhashsu::Hash32(data, len++)); len -= 3; return alive > 0; }
Check(farmhashsu::Hash32WithSeed(data + offset, len, SEED));
Check(farmhashsu::Hash32(data + offset, len));

  return true;
#undef Check
#undef IsAlive
}

int RunTest() {
  Setup();
  int i = 0;
  cout << "Running farmhashsuTest";
  if (!Test(-1)) {
    cout << "... Unavailable\n";
    return NoteErrors();
  }
  // Good.  The function is attempting to hash, so run the full test.
  int errors_prior_to_test = errors;
  for ( ; i < kTestSize - 1; i++) {
    Test(i * i, i);
  }
  for ( ; i < kDataSize; i += i / 7) {
    Test(0, i);
  }
  Test(0, kDataSize);
  cout << (errors == errors_prior_to_test ? "... OK\n" : "... Failed\n");
  return NoteErrors();
}

#else

// After the following line is where the code to print hash codes will go.
void Dump(int offset, int len) {
cout << farmhashsu::Hash32WithSeed(data + offset, len, SEED) << "u," << endl;
cout << farmhashsu::Hash32(data + offset, len) << "u," << endl;
}

#endif

#undef SEED
#undef SEED1
#undef SEED0

}  // namespace farmhashsuTest

#if TESTING

static int farmhashsuTestResult = farmhashsuTest::RunTest();

#else
int main(int argc, char** argv) {
  Setup();
  cout << "uint32_t expected[] = {\n";
  int i = 0;
  for ( ; i < kTestSize - 1; i++) {
    farmhashsuTest::Dump(i * i, i);
  }
  for ( ; i < kDataSize; i += i / 7) {
    farmhashsuTest::Dump(0, i);
  }
  farmhashsuTest::Dump(0, kDataSize);
  cout << "};\n";
}
#endif

#endif  // FARMHASHSELFTEST